ASU BIO 100 Exam 3 Questions & Answers Graded A+

ASU BIO 100 Exam 3 Questions &
Answers 2026-2027 Graded A+
Explain the functions of each system of the body: Digestive - correct answer-
Mechanical and chemical breakdown/digestion of food. Absorption of nutrients. Undigested waste prod
uct that is eliminated.



Explain the functions of each system of the body: Cardiovascular (respiratory and circulatory) -
correct answer-
Transportation (blood delivers oxygen and nutrients), regulation of body temperature, and immunity



Explain the functions of each system of the body: Immune - correct answer-
Battle infection, maintain homeostasisBby eliminating damaged cells, protects the body against foreign o
rganisms.



Explain the functions of each system of the body: Skeletal - correct answer-
support, movement, storage of minerals (bone marrow) blood cell formation



Explain the functions of each system of the body: muscular - correct answer-
movement, maintenance of body posture, production of heat, contraction of the heart, blood pressure
maintenance, intestinal movement (elimination of feces)



Explain the functions of each system of the body: Endocrine - correct answer-
Communication, integration, and control (hormonally)



Explain the functions of each system of the body: Reproductive - correct answer-
ensures survival of the human race



Explain the functions of each system of the body: Nervous - correct answer-
Communication, integration, control, recognition of sensory stimuli (CNS & PNS)



Compare and contrast how positive and negative feedback mechanisms are used to maintain homeostas
is. Use these concepts to describe: The maintenance of blood glucose levels: - correct answer-
The control of blood sugar (glucose) by insulin is another good example of a negative feedback mechani
sm. When blood sugar rises, receptors in the body sense a change. In turn, the control center (pancreas)

, secretes insulin into the blood effectively lowering blood sugar levels. Once blood sugar levels reach ho
meostasis, the pancreas stops releasing insulin.



Compare and contrast how positive and negative feedback mechanisms are used to maintain homeostas is
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. Use these concepts to describe: The release of platelets to form blood clots: - correct answer-
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once a vessel is damaged, platelets start to cling to the injured site and release chemicals that attract m or
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e platelets. The platelets continue to pile up and release chemicals until a clot is formed.
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What does it mean if an organism is an ectotherm? - correct answer-
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depend mainly on external heat sources -
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their body temperature changes with the temperature of the environment (reptiles, snakes, lizards)
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What does it mean if an organism is an Endotherm? - correct answer-
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generate most of the heat they need internally (mammals/humans/dogs)
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Herbivorous mammals tend to have extremely long digestive systems, especially the intestines; omnivor e
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s have intermediate length intestines; and carnivores have extremely short intestines. What might be a log
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ical explanation for this pattern? - correct answer-
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Plants are hard to break down and need more time to get nutrients.
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Why do strict vegetarians (vegans) have to be more careful of their choices of food than do vegetarians t
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hat also eat cheese, eggs, and dairy products? - correct answer-
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Because they aren't getting the vitamins and amino acids the body requires to function properly
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How do vaccines work? - correct answer-
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The body will produce antibodies against the vaccine so when you have the real thing your body will be p
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repared. You may not even get sick. X2 X2 X2 X2 X2 X2




In Southern Copperhead snake venom; you'll find a protein called a disintegrin. Disintegrins bind to a cla s
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s of membrane receptors called integrins. Platelets use integrin receptors to aggregate at a site of tissu e
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damage. What effect do you think disintegrin has on the snake's prey? - correct answer-
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The molecule interferes with clot formation so that the venom can travel more efficiently from the site o
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f the bite to the rest of the body.
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