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STatiana [176]
3 years ago
6

During exercise, sensory receptors detect changes in oxygen and carbon dioxide levels in the blood. This information is then sen

t to the brain's medulla, which causes the heart to beat faster and increases the rate of breathing. Exercising also causes the nervous system to signal the pancreas and thyroid gland to release hormones which regulate metabolism. Which statement is best demonstrated by this scenario? A. Exercise is important for the body to function properly. B. Increased heart rate and blood flow decrease oxygen supply. C. Nerves transmit and respond to every major system in the body. D. Hormones act as signal molecules between all body systems.
Biology
2 answers:
NeTakaya3 years ago
8 0

The answer is nerves transmit and respond to every major system of the body. I just took the test for PLATO

mart [117]3 years ago
3 0

ANSWER: A. Exercise is important for the body to function properly.

Exercise  deliver adequate amounts of oxygen and remove waste from body tissues by regulating nervous, respiratory, circulatory and hormonal systems in the body. During exercise, body tissues and other metabolic processes in the body requires oxygen.Low levels of oxygen and higher levels of carbon dioxides are mainly detected by sympathetic division of the autonomic nervous system which control the physical activity of the body by increasing heart rate, blood pressure and respiration  as a result of this there is an increase in the amount of blood pumped per minute by the heart and oxygenated body gets distributed to the tissues. This also involves release of glucose by the liver as an energy reservoir to control the level of blood glucose pancreas secrete insulin hormone , thyroid gland is also stimulated in response to increase heart rate.


 

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Please answer these 4 questions!!!! All you have to do is fill in the blank with one of the words at the top!
maw [93]
Answer:
Sensory receptors respond to stimuli by sending messages to the brain for immediate behavior or storage as memories.
Mechanical Input enters the body using vibrations through the skin and ears.
Chemical input enters the body using molecules through the nose and mouth.
Electromagnetic input enters the body using waves through the eyes.
5 0
3 years ago
Coastal communities often experience milder winters and cooler summers than further inland because of which of these factors?
Nostrana [21]

Answer: A.

Explanation: You're welcome. :D

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3 years ago
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A bear walks into the room. In response, you run away. Trace the events that occur from the initial release of epinephrine to th
Kaylis [27]

Answer:

a. Epinephrine >> G protein-coupled receptor >> cAMP >> phosphorylation of glycogen phosphorylase and glycogen synthase >> glucose

b. Cellular respiration >> glycolysis >> pyruvate oxidation >> Krebs cycle >> acetyl CoA>> oxidative phosphorylation

c and e. Acetylcholine >> nicotinic receptors >>  sodium ions (enter to the cells) >> muscular action potential >> contraction

d. Action potential >> resting potential >> potassium channels open >> sodium channels open >> threshold potential >> voltage-gated sodium channels and potassium channels open >> membrane  repolarization >> resting membrane potential (steady state of the cell)

​Explanation:

Epinephrine binds to G protein-coupled receptors, triggering the production of cyclic AMP (cAMP). cAMP is a second messenger associated with the phosphorylation of 1-glycogen phosphorylase (GP) that breaks down glycogen (the storage form of glucose) into glucose, and 2-glycogen synthase (GS), involved in the production of glycogen (i.e., phosphorylation inhibits GS activity). On the other hand, during cellular respiration, glucose is used to synthesize ATP via three sequential steps: glycolysis, Krebs cycle and oxidative phosphorylation. During glycolysis, glucose is converted into pyruvate that is subsequently oxidated into Coenzyme A (acetyl CoA), generating NADH and ATP. In the Krebs cycle, acetyl CoA is combined with the oxaloacetic acid to form citric acid, generating NADH, FADH2 and ATP. During oxidative phosphorylation, electrons from NADH and FADH2 are used to pump protons against an electrochemical concentration gradient, which is finally used to synthesize more ATP. On the other hand, during muscle contraction, acetylcholine binds to nicotinic receptors and sodium ions enter the muscle fiber, thereby generating a muscular action potential that travels across muscle cells and triggers muscle contraction when calcium ions (Ca2+) bind to the protein complex troponin by sarcomere shortening (sarcomeres are the functional units of muscle fibers). This contraction ends when Ca2+ ions are pumped back into the sarcoplasmic reticulum (a unique organelle of endoplasmic reticulum in the sarcoplasm). On the other hand, an action potential is defined as a fast and propagating change of the resting membrane potential of neuron cells. In the resting potential, potassium ion (K+) channels open, thereby K+ ions can enter/exit inside the cell. A stimulus causes the depolarization of the cell by opening Na+ channels that enter into the neuron. At the threshold potential, more sodium channels open, thereby voltage across the membrane reaches its most positive value. Subsequently, channels begin to close and more potassium channels open. Finally, the membrane repolarizes (K+ ions leave the cell) and cells return to the resting membrane potential, i.e., the steady-state of the cell.

5 0
3 years ago
How would inbreeding affect allele frequencies and genotype frequencies in a population?
Finger [1]
<h2>Inbreeding </h2>

Explanation:

Inbreeding is defined as the formation of offspring which results from the mating of two closely related organisms

Inbreeding affects allele frequencies and genotype frequencies in a population in following ways:

  • Inbreeding increases homozygosity which in turn decreases the biological fitness of a population because there are chances that offsprings will be affected by deleterious traits in this case
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5 0
4 years ago
What name is given to the process by which detritivores return carbon to the atmosphere? What name is given to the process by wh
tensa zangetsu [6.8K]

1. Answer;

-Decomposition

The process by which detritivores return carbon to the atmosphere is decomposition.

Explanation;

-Decomposers, organisms that break down organic compounds (which eventually leads to mineralization, the process of turning organic material into inorganic material). Decomposition releases compounds sequestered in non-living organic matter. This may include whole dead organisms, fragments such as leaves, fecal matter, or practically anything you throw into the compost pile.

-Decomposition occurs in three stages, always beginning with dead organic matter and involving many bacteria, fungi, and detritus feeders. Since this dead organic matter can be complex, there must be a succession of species to complete the process.

2. Answer;

-Algae

Algae removes carbon from the atmosphere.

Explanation;

-CO2 is removed from the atmosphere primarily by photosynthesis and returned by respiration. Land plants, algae and cyanobacteria (autotrophic organisms or producers) are converting inorganic carbon (atmospheric CO2, dissolved CO2) in organic carbon (biomass).

-All algae contain chlorophyll even though they may not appear green. Some algae are red or brown in color this is because they contain more red or brown.pigments (colour). Chlorophyll is like a factory within algae and is used to make its own sugars. These sugars are called glucose. All algae cells contain chlorophyll. Algae also need carbon dioxide to make sugars.  Algae are good for the environment as they absorb carbon dioxide from the atmosphere and use it to make energy.

3. Answer;

-Dead organic matter and excreted wastes

Detritus is composed of dead organic matter and excreted wastes.

Explanation;

-Detritivores are also referred to as decomposers who get their energy from detritus; eaten by secondary and tertiary consumers. There are many examples of detritivores; some of them include millipedes, dung beetles, earthworms, fiddler crabs and sea cucumbers. Earthworms eat decaying plant and animal matter in the soil.

-Decomposers break down the dead organisms through decomposition while the detritivores consume the decaying organisms.

7 0
4 years ago
Read 2 more answers
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