ASU BIO 181 Exam 1 Questions with Correct Answers 2026 | Complete Biology Study Pack

ASU BIO 100 Exam 3 Questions & Answers gh gh gh gh gh gh gh




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Explain the functions of each system of the body: Digestive - correct answer-
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Mechanical and chemical breakdown/digestion of food. Absorption of nutrients. Undigested waste prod
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uct that is eliminated.
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Explain the functions of each system of the body: Cardiovascular (respiratory and circulatory) -
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correct answer-
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Transportation (blood delivers oxygen and nutrients), regulation of body temperature, and immunity
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Explain the functions of each system of the body: Immune - correct answer-
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Battle infection, maintain homeostasisBby eliminating damaged cells, protects the body against foreign o
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rganisms.
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Explain the functions of each system of the body: Skeletal - correct answer-
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support, movement, storage of minerals (bone marrow) blood cell formation
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Explain the functions of each system of the body: muscular - correct answer-
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movement, maintenance of body posture, production of heat, contraction of the heart, blood pressure
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maintenance, intestinal movement (elimination of feces)
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Explain the functions of each system of the body: Endocrine - correct answer-
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Communication, integration, and control (hormonally)
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Explain the functions of each system of the body: Reproductive - correct answer-
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ensures survival of the human race
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Explain the functions of each system of the body: Nervous - correct answer-
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Communication, integration, control, recognition of sensory stimuli (CNS & PNS)
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Compare and contrast how positive and negative feedback mechanisms are used to maintain homeostas
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is. Use these concepts to describe: The maintenance of blood glucose levels: - correct answer-
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The control of blood sugar (glucose) by insulin is another good example of a negative feedback mechani
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sm. When blood sugar rises, receptors in the body sense a change. In turn, the control center (pancreas)
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, secretes insulin into the blood effectively lowering blood sugar levels. Once blood sugar levels reach ho
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gh meostasis, the pancreas stops releasing insulin. gh gh gh gh gh




Compare and contrast how positive and negative feedback mechanisms are used to maintain homeostas
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is. 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
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ore 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
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es have intermediate length intestines; and carnivores have extremely short intestines. What might be a
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logical 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
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that 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
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prepared. You may not even get sick.
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In Southern Copperhead snake venom; you'll find a protein called a disintegrin. Disintegrins bind to a cla
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ss of membrane receptors called integrins. Platelets use integrin receptors to aggregate at a site of tissu
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e 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
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of the bite to the rest of the body.
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