ASU BIO 100 Exam 3 Questions &
Answers Graded To A+ 2025-2026
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. Use these concepts to describe: The release of platelets to form blood clots: CORRECT ANSWER
once a vessel is damaged, platelets start to cling to the injured site and release chemicals that attract m
ore platelets. The platelets continue to pile up and release chemicals until a clot is formed.
What does it mean if an organism is an ectotherm? CORRECT
ANSWER depend mainly on external heat sources -
their body temperature changes with the temperature of the environment (reptiles, snakes, lizards)
What does it mean if an organism is an Endotherm? CORRECT ANSWER
generate most of the heat they need internally (mammals/humans/dogs)
Herbivorous mammals tend to have extremely long digestive systems, especially the intestines; omnivor
es have intermediate length intestines; and carnivores have extremely short intestines. What might be a
logical explanation for this pattern? CORRECT ANSWER
Plants are hard to break down and need more time to get nutrients.
Why do strict vegetarians (vegans) have to be more careful of their choices of food than do vegetarians
that also eat cheese, eggs, and dairy products? CORRECT ANSWER
Because they aren't getting the vitamins and amino acids the body requires to function properly
How do vaccines work? CORRECT ANSWER
The body will produce antibodies against the vaccine so when you have the real thing your body will be
prepared. You may not even get sick.
In Southern Copperhead snake venom; you'll find a protein called a disintegrin. Disintegrins bind to a cla
ss of membrane receptors called integrins. Platelets use integrin receptors to aggregate at a site of tissu
e damage. What effect do you think disintegrin has on the snake's prey? CORRECT ANSWER
The molecule interferes with clot formation so that the venom can travel more efficiently from the site
of the bite to the rest of the body.
Answers Graded To A+ 2025-2026
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. Use these concepts to describe: The release of platelets to form blood clots: CORRECT ANSWER
once a vessel is damaged, platelets start to cling to the injured site and release chemicals that attract m
ore platelets. The platelets continue to pile up and release chemicals until a clot is formed.
What does it mean if an organism is an ectotherm? CORRECT
ANSWER depend mainly on external heat sources -
their body temperature changes with the temperature of the environment (reptiles, snakes, lizards)
What does it mean if an organism is an Endotherm? CORRECT ANSWER
generate most of the heat they need internally (mammals/humans/dogs)
Herbivorous mammals tend to have extremely long digestive systems, especially the intestines; omnivor
es have intermediate length intestines; and carnivores have extremely short intestines. What might be a
logical explanation for this pattern? CORRECT ANSWER
Plants are hard to break down and need more time to get nutrients.
Why do strict vegetarians (vegans) have to be more careful of their choices of food than do vegetarians
that also eat cheese, eggs, and dairy products? CORRECT ANSWER
Because they aren't getting the vitamins and amino acids the body requires to function properly
How do vaccines work? CORRECT ANSWER
The body will produce antibodies against the vaccine so when you have the real thing your body will be
prepared. You may not even get sick.
In Southern Copperhead snake venom; you'll find a protein called a disintegrin. Disintegrins bind to a cla
ss of membrane receptors called integrins. Platelets use integrin receptors to aggregate at a site of tissu
e damage. What effect do you think disintegrin has on the snake's prey? CORRECT ANSWER
The molecule interferes with clot formation so that the venom can travel more efficiently from the site
of the bite to the rest of the body.
