BIO 100 FINAL EXAM 3 QUESTIONS AND ALL CORRECT ANSWERS .
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Bio 100
Institution
Bio 100
Explain the functions of each system of the body: Digestive - Answer Mechanical and chemical breakdown/digestion of food. Absorption of nutrients. Undigested waste product that is eliminated.
Explain the functions of each system of the body: Cardiovascular (respiratory and circulatory) - Answ...
BIO 100 FINAL EXAM 3 QUESTIONS
AND ALL CORRECT ANSWERS .
Explain the functions of each system of the body: Digestive - Answer Mechanical and chemical
breakdown/digestion of food. Absorption of nutrients. Undigested waste product that is eliminated.
Explain the functions of each system of the body: Cardiovascular (respiratory and circulatory) - Answer
Transportation (blood delivers oxygen and nutrients), regulation of body temperature, and immunity
Explain the functions of each system of the body: Immune - Answer Battle infection, maintain
homeostasis by eliminating damaged cells, protects the body against foreign organisms.
Explain the functions of each system of the body: Skeletal - Answer support, movement, storage of
minerals (bone marrow) blood cell formation
Explain the functions of each system of the body: muscular - 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 - Answer Communication, integration, and
control (hormonally)
Explain the functions of each system of the body: Reproductive - Answer ensures survival of the human
race
Explain the functions of each system of the body: Nervous - Answer Communication, integration,
control, recognition of sensory stimuli (CNS & PNS)
Compare and contrast how positive and negative feedback mechanisms are used to maintain
homeostasis. Use these concepts to describe: The maintenance of blood glucose levels: - Answer The
control of blood sugar (glucose) by insulin is another good example of a negative feedback mechanism.
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
homeostasis, the pancreas stops releasing insulin.
Compare and contrast how positive and negative feedback mechanisms are used to maintain
homeostasis. Use these concepts to describe: The release of platelets to form blood clots: - Answer
once a vessel is damaged, platelets start to cling to the injured site and release chemicals that attract
more 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? - 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? - Answer generate most of the heat they need
internally (mammals/humans/dogs)
Herbivorous mammals tend to have extremely long digestive systems, especially the intestines;
omnivores have intermediate length intestines; and carnivores have extremely short intestines. What
might be a logical explanation for this pattern? - 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? - Answer Because they aren't getting the vitamins and
amino acids the body requires to function properly
How do vaccines work? - 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
class of membrane receptors called integrins. Platelets use integrin receptors to aggregate at a site of
tissue damage. What effect do you think disintegrin has on the snake's prey? - 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.
Anatomical designs that increase surface area are common in many body systems. Give examples of how
surface area is maximized in the digestive, respiratory, and nervous systems of humans. Digestive: -
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