Our volitional centre, the motor cortex, is where we impose specific facial expressions in order to convey the desired message or because the situation requires it.
What is the purpose of the motor cortex?The motor cortex's main job is to provide signals that control how the body moves. It is anterior to the central sulcus and a portion of the frontal lobe. The primary motor cortex, premotor cortex, and supplementary motor area make up this region.What kinds of motions does the motor cortex regulate?The motor cortex generates signals that are particular to movements and sends them to the muscles via spinal cord circuits and motor neurons to regulate motor behaviour. For the execution of movements to be precise, coordinated muscle activation patterns are required.learn more about motor cortex here
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If the number of cigarettes smoked increases, then the risk for lung cancer increases. Independent variable: _______ Dependent variable: _______ If the number of sharks swimming in a coastal region increases, then the number of shark attacks on humans will also increase. Independent variable: _______ Dependent variable: _______ If the amount of milk a person drinks increases, the strength of his or her bones will stay the same. Independent variable: _______ Dependent variable: _______
Complete Question:
Part A: Identifying Variables
Read the following hypotheses and identify the variables.
If the number of cigarettes smoked increases, then the risk for lung cancer increases.
Independent variable: _______
Dependent variable: _______
If the number of sharks swimming in a coastal region increases, then the number of shark attacks on humans will also increase.
Independent variable: _______
Dependent variable: _______
If the amount of milk a person drinks increases, the strength of his or her bones will stay the same.
Independent variable: _______
Dependent variable: _______
Answer/Explanation:
Dependent variables are variables that is dependent on the independent variables. That is, it is the variable that changes as the independent variable changes.
Depedent variable is the main interest if a researcher. It is the variable that is measured in a research work.
In the above given hypotheses, the dependent and independent variables are shown below:
1. "risk for lung cancer" is dependent on the "number of cigarettes smoked".
"Risk for lung cancer" => dependent variable
Number of cigarettes => independent variable
2. "number of shark attacks on humans" is dependent on "number of sharks swimming".
Dependent variable => number of shark attacks on humans
Independent variable => number of sharks swimming
3. Dependent variable => strength of bone
Independent variable => amount of milk a person drinks
Answer:
Lab: Heart Rate
Part A: Identifying Variables
The dependent variable happens as a result of values/changes associated with the independent variable.
Independent variable: number of cigarettes smoked
Dependent variable: risk for lung cancer
Independent variable: number of sharks swimming in a coastal region
Dependent variable: number of shark attacks on humans
Independent variable: amount of milk a person drinks
Dependent variable: the strength of his or her bones
Part B: Heart Rate
Hypothesis: If I hold my breath for 30 seconds, then my heart rate will
(choose 1) increase/decrease.
Independent variable: holding my breath
Dependent variable: heart rate
Part C:
The heart rate decreases because oxygen exchange in the lungs decreases.
This depends on what you chose for heart rate in the hypothesis. If you said the heart rate decreases after holding your breath, and the results showed the heart rate decreased, then the hypothesis is supported. If you said the heart rate decreases after holding your breath, and the results showed the heart rate increased, then you refuted the hypothesis.
Heart rate can change due to an increase or decrease in activity, moving positions such as sitting and standing, and emotions.
Example: Increase in activity—jumping jacks
Hypothesis: If I do five jumping jacks, then my heart rate will increase.
Test hypothesis. You can use the average resting heart rate from the previous experiment. If you do an experiment with an increase in physical activity like jumping jacks, then your data will reflect an increase in heart rate because the body requires more energy, which requires more oxygen, increasing the overall flow of blood in the body.
Support or refute the hypothesis based on the results. The hypothesis is supported if it aligns with the observed results. The hypothesis is refuted if the results don’t match the statement based on the variables.
Testing more than one variable at a time makes it difficult to interpret the results and support or refute the hypothesis. With one variable, the results can be associated with changes to that variable. To get the most reliable data to support or refute a hypothesis, an experiment should be completed several times to see if the results show the same trends.
Explanation:
Penn Foster
Why does eclipse occur
Answer: When the moon orbits the earth, it can move between the sun and the earth. When this happens, the moon blocks sunlight from reaching Earth. This causes a solar eclipse or solar eclipse. During a solar eclipse, the moon casts a shadow on the earth.
Explanation:
A post- doctorate position is most likely to be held by Oa geriatric allergist an allergist a pediatric immunologist. A scientific research immunologist .
Answer:
A scientific research immunologist
Explanation:
A postdoctoral (commonly called postdoc) position is a temporary working position assigned by a particular institution/government agency to investigate questions referred to a particular research field/discipline (e.g., economy, molecular biology, immunology, politics, etc). In general, a postdoc is a 2-year position obtained after Ph.D. (i.e., Doctor of Philosophy) completion. This short-term research position is useful for professionals who require further training in a particular field/discipline, giving the individual more independence than in a Ph.D., which allows the development of technical skills and increases his/her interest in a particular research area.
Answer:
it's A: Protecting the body, excreting wastes, sensing temperature changes, and generating vitamins.
Explanation:
edge 2021
plzz help
What happens during interphase?
The nucleus grows to its full size.
The cell grows to its full size.
The nucleus divides into two nuclei.
The cell divides into two cells.
Answer:
b
Explanation:
Answer:
Your answer is: The cell grows to its full size.
Explanation:
In response to the hormone cholecystokinin, the pancreas secretes a fluid that contains: a. only proteinases. b. bile. c. enzymes. d. only amylase. e. bicarbonate.
In response to the hormone cholecystokinin, the pancreas secretes a fluid that contains enzymes and bicarbonate. Therefore, the correct options are option c.
enzymes and option e. bicarbonate. Cholecystokinin, also known as CCK, is a peptide hormone released by I cells in the duodenum, the first portion of the small intestine. This hormone is secreted in response to the presence of food, particularly fat and protein, in the stomach and small intestine. The hormone cholecystokinin stimulates the pancreas to secrete its contents, which include enzymes and bicarbonate.
The pancreas produces three main types of enzymes that aid in the digestion of carbohydrates, proteins, and fats, respectively. Bicarbonate neutralizes the acidic contents of the stomach, allowing for the digestive enzymes to function at a more favorable pH. This neutralization process is important because the digestive enzymes that the pancreas releases are sensitive to pH changes.
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a plate boundary where plates slide past each other.
The plate boundary where plates slide past each other is called a transform boundary.Transform boundary.
A transform boundary is a type of plate boundary where two plates slide past each other. Transform boundaries are also known as conservative plate boundaries because the plates slide past each other without forming or destroying the lithosphere.
Transform boundaries are generally associated with high earthquake activity since the movement of the plates causes friction pressure and stress that result in tremors and quakes. One of the most well-known examples of a transform boundary is the San Andreas Fault in California.
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Which biome typically experiences hot summers, cold winters, and lots of rain? temperate grassland
tropical rainforest
coniferous forest
temperate deciduous forest
6. Short answer type questions: a. Write any two examples of molluscs. b. Define invertebrate. c. Name the organ used by hydra to swim. d. Which phylum includes soft unsegmented animals? e. What are compound eyes? f. Name an animal that has osculum.
a. Examples of molluscs include squids, octopuses, cuttlefishes, snails, and clams. These are invertebrates with soft, unsegmented bodies, most of which are protected by a shell.
b. Invertebrates are animals that lack a backbone or vertebral column. Most of the animal kingdom is made up of invertebrates, including insects, mollusks, arachnids, and crustaceans. Invertebrates come in a variety of shapes and sizes, with different body structures and methods of movement.
c. Hydra uses its tentacles to swim. Hydra's tentacles are covered in cilia, which are tiny hair-like structures that help it move through the water. These cilia work together to create a current that propels the hydra forward.
d. The phylum that includes soft, unsegmented animals is Mollusca. This phylum includes a wide variety of organisms with soft bodies, many of which are protected by a shell. Some mollusks, like snails and slugs, move using a muscular foot, while others, like squids and octopuses, use jet propulsion to move through the water.
e. Compound eyes are a type of eye that is found in many insects and crustaceans. These eyes are made up of many small, individual lenses, each of which captures a small portion of the visual field. The brain then combines the signals from each of these lenses to create a complete image.
f. Sponges have an osculum, which is a large opening on the top of the sponge that is used to expel water and waste products. Sponges are filter feeders that rely on the flow of water through their bodies to capture food particles and oxygen. The osculum helps to regulate this flow of water, ensuring that the sponge has a steady supply of nutrients.
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Please find three different current events using the internet and for each current event write a one paragraph response about the event or what you think of the event.
Response: The successful launch and landing of SpaceX's reusable rocket for the tenth time is an impressive feat in the realm of space exploration and technology. It signifies a significant step towards achieving cost-effective space travel and exploration.
Reusability plays a crucial role in reducing the overall expenses associated with space missions, as it eliminates the need to build new rockets for every launch. SpaceX's continued success in landing and reusing rockets demonstrates their commitment to innovation and sustainability in the aerospace industry, opening up possibilities for future space exploration and colonization.
Current Event: Global climate strikes mobilize millions of people worldwide demanding urgent action on climate change.Response: The global climate strikes, with millions of people uniting to demand urgent action on climate change, highlight the growing awareness and concern for the environmental crisis facing our planet. The scale and impact of these strikes send a powerful message to governments and industries that immediate steps must be taken to address climate change and transition towards a sustainable future.
The engagement of young people and their passionate advocacy for climate justice is inspiring and serves as a reminder of the collective responsibility we all share in preserving the planet for future generations. It is crucial for governments, businesses, and individuals to listen to these calls for action and work towards implementing meaningful changes to mitigate the effects of climate change.
Current Event: Breakthrough in medical research shows promising results in the development of a potential HIV vaccine.Response: The breakthrough in medical research towards the development of a potential HIV vaccine is a significant milestone in the ongoing battle against the HIV/AIDS epidemic. The prospect of an effective vaccine brings hope for the prevention and eventual eradication of HIV, which has had a devastating impact on millions of lives globally.
This achievement underscores the importance of scientific research, innovation, and collaboration in tackling complex health challenges. While further studies and trials are needed, this progress marks a positive step forward in the quest for an HIV vaccine and offers renewed optimism in the fight against this persistent and life-threatening disease.
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History taking is key part of each initial consultation. Which of the following is NOT typically included?
How the animal is behaving
What tests are going to be carried out
What the symptoms are
How the animal is eating and drinking
What treatments they are receiving (including non-prescribed)
Answer:
what test are going to be carried out
Within the chloroplast, the gelatinous fluid containing dna, ribosomes, and enzymes is called the?
Within the chloroplast, the gelatinous fluid containing DNA, ribosomes, and enzymes is called the Stroma.
What are cell organelles?Cell organelles refers to membrane-bound structures which are found within the cell and perform specific functions within the cell.
There are different cells organelles which are found within each cells.
The cell organelles most prominent in a cell depends on the specialized function of the cell.
The chloroplast is a cell organelle found in plants whose function is that it contains the pigment chlorophyll which is involved in photosynthesis.
The stroma is a gelatinous fluid found within the chloroplast which contains DNA, ribosomes, and enzymes.
In conclusion, the chloroplast is a cell organelle in plants.
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Refer to the illustration above. The cell shown is probably an animal cell because it *
A)has mitochondria.
B)does not have a cell wall.
C)has a cell membrane.
D)does not have a nucleus.
30 POINTSSSSS !!!!!!!!!! NEEEED HELPPP what is a organism (NOT A PLANT) that uses chemosynthesis, photosynthesis, and cellular respiration??
Answer:
Bacteria and Fungi uses the above.
Answer:
Bacteria and fungi.
Explanation:
An organism with a cell wall would most likely be unable to take in materials through?
Answer:An organism with a cell wall would most likely be unable to take in materials like food via phagocytosis because their cell wall is inhibiting that change in cellular structure.
Which of the following is NOT a property used to establish the medullary osmotic gradient?
A. the filtrate flow through the ascending and descending limbs of the long nephron loops of juxtamedullary nephrons
B. the blood flow through the ascending and descending portions of the vasa recta
C. the descending limb's permeability to water and impermeability to salt
D. the ascending limb's impermeability to water and permeability to salt
The property that is NOT used to establish the medullary osmotic gradient is the filtrate flow through the ascending and descending limbs of the long nephron loops of juxtamedullary nephrons.
The establishment of the medullary osmotic gradient is a complex process that involves multiple properties. The descending limb's permeability to water and impermeability to salt and the ascending limb's impermeability to water and permeability to salt are two critical properties that contribute to the generation and maintenance of the gradient. Additionally, the blood flow through the ascending and descending portions of the vasa recta plays a crucial role in preventing the washout of the gradient by maintaining a countercurrent exchange system. Together, these properties enable the kidney to generate a concentration gradient that allows for the concentration of urine and the conservation of water in the body.
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This other metal is in period 6. It's ionization energy and metallic character is less than Tin (Sn) but has the same # of valence electrons as tin and has less than 100 protons. A. Germanium, Ge B. Thallium, Tl C Lead, Pb B. Indium, In This element has 4 valence electrons, and properties similar to carbon, its atomic radius is less than Germanium but larger than Phosphorus and it is more electronegative than Aluminum. A. Germanium, Ge B. Aluminum, Al C. Carbon, C D. Silicon, Si To determine if a chemical reaction has taken place look for the following clues: (Chose all that apply). A a change in energy (heat/light) B. a precipitate forms C. a gas is produced E. a change in color that is different from the original color(s) F. the substance crumbles into pieces
The metal in period 6 with ionization energy and metallic character less than Tin (Sn) but having the same number of valence electrons as Tin and fewer than 100 protons is Lead (Pb).
Lead is a metal in period 6 of the periodic table, and its properties align with the given description. It has a lower ionization energy and metallic character compared to Tin, shares the same number of valence electrons, and has an atomic number of 82, which is fewer than 100.
The element with 4 valence electrons, properties similar to carbon, an atomic radius smaller than Germanium but larger than Phosphorus, and more electronegative than Aluminum is Silicon (Si).
Silicon possesses these characteristics: it has 4 valence electrons, similar properties to carbon as both are in the same group (Group 14), its atomic radius is smaller than Germanium but larger than Phosphorus, and it is more electronegative than Aluminum.
To determine if a chemical reaction has taken place, the clues to look for are: A) a change in energy (heat/light), B) a precipitate forms, C) a gas is produced, E) a change in color that is different from the original color(s), and F) the substance crumbles into pieces. These observations can indicate that a chemical reaction has occurred.
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Which statement describes an advantage of sexual reproduction of aphids
A:Offspring are identical to the parents
B:More offspring will be produced more rapidly
C:The biodiversity of aphids will increase
D:Mates are not necessary
Which term describes the relationship in which one organism lives inside the other one. Check ih correct answer
Answer:
The term that describes the relationship in which one organism lives inside the other one is endosymbiosis.
Explanation:
Which of the following best describes Growing Degree Day total?
A. a measure of the amount of heat needed to encourage plant growth
B. a measure of the amount of heat a plant is exposed to over a single day
C. a measure of the amount of heat a plant must experience before reaching maturity
D. a measure of the amount of heat tolerance a plant demonstrates
Answer:
C.a measure of the amount of heat a plant must experience before reaching maturity
Which of the following statements is true about enzyme-catalyzed reactions? Select one: a. They alter the (Delta G) of a reaction. b. Enzyme-catalyzed reactions are all exergonic. c. The reaction proceeds quickly because it has increased activation energy d. The reaction proceeds faster than the same reaction in the absence of the enzyme. e. Their performance is unaffected by environmental conditions (e.g. pH, temperature).
Statement is true about enzyme-catalyzed reactions is d. The reaction proceeds faster than the same reaction in the absence of the enzyme.
Enzyme-catalyzed reactions are chemical reactions that are accelerated by enzymes, which are biological catalysts. These enzymes lower the activation energy required for the reaction to occur, allowing it to proceed at a faster rate than it would without the enzyme.
This increased rate does not alter the Delta G (change in free energy) of the reaction (option a) and does not mean the reactions are all exergonic (option b).
he reaction does not proceed quickly because of increased activation energy, but rather because the enzyme lowers the activation energy (option c).
Lastly, enzyme performance is affected by environmental conditions such as pH and temperature (option e), which can impact their function and efficiency.
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Which of the following is an example of a body fossil?
1. Dinosaur footprint
2. Shell mold
3. Ankylosaurs bone
4. Petrified wood
Answer:
3. Ankylosaurs bone
Explanation:
Body fossil – The remains of part (or all) of an actual organism.
If a mother has an AB blood type and her daughter has BB blood type, The dad has
AA blood, the mailman has type AO blood and the neighbor has BO blood. Which one is really the father?
A.the dad
B.the mailman
C.the neighbor
D.none of them
Answer:
c. neighbor
Explanation:
half the mother, half by fathee
list four factors that can be varied to change the strength of the magnets
The four main factors which affect the strength of an electromagnet are as follows: the loop count, the current, the wire size, and the presence of an iron core.
What is an Electromagnet?An electromagnet is defined as the type of magnet in which the magnetic field is produced by an electric current that consists of wire wound in a coil. A current through the coil creates a magnetic field which is concentrated in the hole at the center of the coil.
The effect can be strengthened by winding a wire tightly around a powerful core made of magnetic material, such as iron.
Thus, the four main factors which affect the strength of an electromagnet are as follows: the loop count, the current, the wire size, and the presence of an iron core.
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the presence of a mrna transcript of a gene in a cell means:
The presence of a mRNA transcript of a gene in a cell means that transcription has taken place. Transcription is a process in which a gene's DNA sequence is used to create an RNA molecule.
The RNA molecule, which is single-stranded, is known as messenger RNA (mRNA) when it has been processed and is ready to be translated into a protein. The RNA polymerase enzyme binds to the gene's DNA and begins transcribing a complementary mRNA strand in the process of transcription.
Genetic information from the DNA to the ribosomes, where it is translated into proteins.Therefore, it can be concluded that the presence of an mRNA transcript of a gene in a cell indicates that the transcription process has taken place.
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Animals that mimic poisonous or dangerous animals use a defense called
mimicry.
batesian
mullerian
Answer:
MimicryExplanation:
The statement which states that animals that mimic poisonous or dangerous animals use a defense called mimicry is true.
Animals that mimic poisonous or dangerous animals use a defense called mimicry. Animals that mimic poisonous or dangerous animals use a defense called BatesianMüllerian mimicry.
Which statement is not true about prokaryotic cells? They are always single-celled organisms, and they never contain mitochondria. They have a circular loop of DNA instead of multiple linear DNA molecules. They lack a nucleus, but they do have ribosomes. They may have flagella, but they never have cilia. They all have a rigid cell wall instead of a plasma membrane.
Answer:
They lack a nucleus, but they do have ribosomes.
Explanation:
Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.
Which pair shows the chromosome numbers in human cells both before and after meiosis?
O 46 and 46
O 23 and 23
O 23 and 46
O 46 and 23
The cumulative work of many scientists can often be summarized as theories or laws. how is a theory different from a law
Answer:
A law is something in science that can be proved through experimenting. When the experiment is done properly, the same outcome will be achieved every time. A law does not attempt to explain why something is the way it is, it only states it.
A theory is an idea that has a large amount of scientific data backing it and is the accepted answer by most scientists, but there is no way to experiment on a scientific theory. A theory will never be able to become a law. A theory explains what it is describing.
Work in a small group or alone to co that follow mplete this exercise. Use the stratigraphy drawing provided to answer the questions that follow1. Which layer is the oldest? 2. Which layer is the youngest (most recent)? 3. In layer B, you find an unfossilized bone. What chronometric dating method could you use to date this layer? For what date range would this method be appropriate? 4. In layer D, you find a fossilized bone. Layer C and layer E are made of volcanic rock. Based on what is available at the site, what strategy will you use to determine a chronometric date for layer D? (Be sure to specify the exact dating method or methods used and the corresponding applicable age ranges.)
The stratigraphy drawing can be used to determine the relative ages of the different layers. Radiocarbon dating can be used to date layer B containing an unfossilized bone.
The layer at the bottom of the stratigraphy drawing is the oldest, indicated by the letter "A." The layer at the top of the stratigraphy drawing is the youngest, indicated by the letter "E."
To date layer B contains an unfossilized bone, one could use radiocarbon dating, also known as carbon-14 dating. This dating method relies on the radioactive decay of carbon-14, which is found in organic materials, such as bone. Carbon-14 dating can be used to determine the age of the bone up to approximately 50,000 years ago, which makes it an appropriate dating method for layer B in the stratigraphy drawing.
To determine a chronometric date for the fossilized bone found in layer D, a combination of different dating methods could be used. Since layers C and E are made of volcanic rock, it is possible to use radiometric dating techniques, such as potassium-argon dating or argon-argon dating, which rely on the decay of radioactive isotopes of potassium to argon, to date these layers.
Once the dates for layers C and E have been determined, it would be possible to bracket the age of layer D. Additionally, other dating methods, such as paleomagnetism, which uses changes in the earth's magnetic field to date rock formations, could be used to further refine the age range of layer D. Ultimately, a combination of dating methods would be necessary to determine a reliable chronometric date for layer D.
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when an advanced airway is in place chest compressions should be provided at a rate of
When an advanced airway is in place chest compressions should be provided at a rate of 100 to 200 per minute. It may be part of a medical emergency.
Chest compressions
Cardiopulmonary resuscitation refers to the emergency which consists of chest compressions combined with artificial ventilation.
This type of methodology (cardiopulmonary resuscitation) must be used when an individual is not breathing properly.
Chest compressions help to maximize cardiac output and also provide a suitable coronary perfusion pressure.
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