SFSU BIOL 212 FINAL EXAM WITH
QUESTIONS AND ANSWERS
ANSWERS AND RATIONSBLE
ACTUAL EXAMLATEST UPDATE
2025/2026 GRADED A+
Homeostasis refers to maintaining a relatively stable internal environment. The "internal environment"
is:
a) the blood cells
b) body parts beneath the skin
c) the cytoplasm of all the cells in the body
d) plasma, interstitial fluid, and transcellular fluid
e) intracellular fluid - correct answer.💖💖💖💖✔<<<<<plasma, interstitial fluid, and transcellular
fluid
Which of the following is an example of positive feedback?
a) Consuming caffeine increases urine output, causing dehydration
b) The arrival of platelets at a wound causes the release of clotting factors which cause more platelets to
arrive at the wound
c) When a person stands up, blood pressure decreases because of the blood pooling in the feet and legs.
As a result, the heart beats faster and blood vessels constrict in order to bring blood pressure back to
normal
d) both a) and b) are correct
e) both b) and c) are correct - correct answer.💖💖💖💖✔<<<<<The arrival of platelets at a wound
causes the release of clotting factors which cause more platelets to arrive at the wound
,Following an increase in body temperature, which of the following responses will NOT occur?
a) an increase in skin blood flow
b) an increase in skin temperature
c) an increase in non-shivering thermogenesis
d) an increase in sweat production
e) an increase in evaporation of the skin - correct answer.💖💖💖💖✔<<<<<an increase in non-
shivering thermogenesis
When pyrogens are present, vasodilation is used by the body to create a fever
a) True
b) False - correct answer.💖💖💖💖✔<<<<<True
Mice from a certain lab strain remain healthy as long as you feed them regularly and do not let them
exercise. After they eat, their blood glucose level rises slightly and then declines to a homeostatic level.
However if these mice fast or if they exercise at all, their blood glucose drops dangerously. Which
hypothesis best explains their problem?
a) The mice have insulin-dependent diabetes
b) the mice lack insulin receptors on their cells
c) the mice lack glucagon receptors on their cells
d) The mice can't synthesize glycogen from glucose - correct answer.💖💖💖💖✔<<<<<The mice
lack glucagon receptors on their cells
Liver cells produce glycogen in response to:
a) glucagon
b) insulin - correct answer.💖💖💖💖✔<<<<<insulin
,One of insulin's mechanisms of action is to:
a) activate Na+/K+ pump
b) increase the activity of SGLT
c) increase the facilitated diffusion of glucose into certain cells in the body
d) increase the number of sodium-linked glucose transporters in the cell membrane
e) more than one of the above is correct - correct answer.💖💖💖💖✔<<<<<increase the facilitated
diffusion of glucose into certain cells in the body
NADH is produced from each reaction described except one. Identify the EXCEPTION.
a) during "aerobic" glycolysis
b) during the electron transport chain
c) in the Krebs cycle
d) during the conversion of pyruvate to acetyl CoA
e) more than one answer applies - correct answer.💖💖💖💖✔<<<<<during the electron transport
chain
Under low oxygen conditions, ____________ must unload its electrons to allow glycolysis to continue its
production of ATP:
a) FADH2
b) lactic acid
c) NAD+
d) pyruvate
e) NADH - correct answer.💖💖💖💖✔<<<<<NADH
Which of the following statements about anaerobic metabolism is FALSE?
a) oxygen is limited or absent
, b) pyruvate moves into the mitochondrion but then accumulates there, since the Krebs cycle does not
occur
c) most of the energy of the glucose molecule remains in the chemical bonds of the carbon molecule
d) the electron transport chain does not occur since oxygen is needed as the final electron acceptor -
correct answer.💖💖💖💖✔<<<<<pyruvate moves into the mitochondrion but then accumulates
there, since the Krebs cycle does not occur
From which of the following will the cell be able to harvest the most chemical energy?
a) an NADH molecule
b) six carbon dioxide molecules
c) two pyruvate molecules
d) a lactic acid molecule
e) a glucose molecule - correct answer.💖💖💖💖✔<<<<<a glucose molecule
Which of the following is NOT true of the cell membrane
a) Cholesterol influences how fluid the membrane is
b) Carbohydrates associate with proteins and lipids on the extracellular side of the membrane
c) there are many different kinds of membrane proteins
d) in certain cells, the phospholipids arrange themselves into the shape of a channel, in order to allow
ions to transport across the membrane - correct answer.💖💖💖💖✔<<<<<in certain cells, the
phospholipids arrange themselves into the shape of a channel, in order to allow ions to transport across
the membrane
The isolation of different proteins to the luminal vs. basolateral surfaces of epithelial cells is due to the
presence of ____________ between the cells in the tissue
a) desmosomes
b) a pump
c) tight junctions
d) gap junctions - correct answer.💖💖💖💖✔<<<<<tight junctions
QUESTIONS AND ANSWERS
ANSWERS AND RATIONSBLE
ACTUAL EXAMLATEST UPDATE
2025/2026 GRADED A+
Homeostasis refers to maintaining a relatively stable internal environment. The "internal environment"
is:
a) the blood cells
b) body parts beneath the skin
c) the cytoplasm of all the cells in the body
d) plasma, interstitial fluid, and transcellular fluid
e) intracellular fluid - correct answer.💖💖💖💖✔<<<<<plasma, interstitial fluid, and transcellular
fluid
Which of the following is an example of positive feedback?
a) Consuming caffeine increases urine output, causing dehydration
b) The arrival of platelets at a wound causes the release of clotting factors which cause more platelets to
arrive at the wound
c) When a person stands up, blood pressure decreases because of the blood pooling in the feet and legs.
As a result, the heart beats faster and blood vessels constrict in order to bring blood pressure back to
normal
d) both a) and b) are correct
e) both b) and c) are correct - correct answer.💖💖💖💖✔<<<<<The arrival of platelets at a wound
causes the release of clotting factors which cause more platelets to arrive at the wound
,Following an increase in body temperature, which of the following responses will NOT occur?
a) an increase in skin blood flow
b) an increase in skin temperature
c) an increase in non-shivering thermogenesis
d) an increase in sweat production
e) an increase in evaporation of the skin - correct answer.💖💖💖💖✔<<<<<an increase in non-
shivering thermogenesis
When pyrogens are present, vasodilation is used by the body to create a fever
a) True
b) False - correct answer.💖💖💖💖✔<<<<<True
Mice from a certain lab strain remain healthy as long as you feed them regularly and do not let them
exercise. After they eat, their blood glucose level rises slightly and then declines to a homeostatic level.
However if these mice fast or if they exercise at all, their blood glucose drops dangerously. Which
hypothesis best explains their problem?
a) The mice have insulin-dependent diabetes
b) the mice lack insulin receptors on their cells
c) the mice lack glucagon receptors on their cells
d) The mice can't synthesize glycogen from glucose - correct answer.💖💖💖💖✔<<<<<The mice
lack glucagon receptors on their cells
Liver cells produce glycogen in response to:
a) glucagon
b) insulin - correct answer.💖💖💖💖✔<<<<<insulin
,One of insulin's mechanisms of action is to:
a) activate Na+/K+ pump
b) increase the activity of SGLT
c) increase the facilitated diffusion of glucose into certain cells in the body
d) increase the number of sodium-linked glucose transporters in the cell membrane
e) more than one of the above is correct - correct answer.💖💖💖💖✔<<<<<increase the facilitated
diffusion of glucose into certain cells in the body
NADH is produced from each reaction described except one. Identify the EXCEPTION.
a) during "aerobic" glycolysis
b) during the electron transport chain
c) in the Krebs cycle
d) during the conversion of pyruvate to acetyl CoA
e) more than one answer applies - correct answer.💖💖💖💖✔<<<<<during the electron transport
chain
Under low oxygen conditions, ____________ must unload its electrons to allow glycolysis to continue its
production of ATP:
a) FADH2
b) lactic acid
c) NAD+
d) pyruvate
e) NADH - correct answer.💖💖💖💖✔<<<<<NADH
Which of the following statements about anaerobic metabolism is FALSE?
a) oxygen is limited or absent
, b) pyruvate moves into the mitochondrion but then accumulates there, since the Krebs cycle does not
occur
c) most of the energy of the glucose molecule remains in the chemical bonds of the carbon molecule
d) the electron transport chain does not occur since oxygen is needed as the final electron acceptor -
correct answer.💖💖💖💖✔<<<<<pyruvate moves into the mitochondrion but then accumulates
there, since the Krebs cycle does not occur
From which of the following will the cell be able to harvest the most chemical energy?
a) an NADH molecule
b) six carbon dioxide molecules
c) two pyruvate molecules
d) a lactic acid molecule
e) a glucose molecule - correct answer.💖💖💖💖✔<<<<<a glucose molecule
Which of the following is NOT true of the cell membrane
a) Cholesterol influences how fluid the membrane is
b) Carbohydrates associate with proteins and lipids on the extracellular side of the membrane
c) there are many different kinds of membrane proteins
d) in certain cells, the phospholipids arrange themselves into the shape of a channel, in order to allow
ions to transport across the membrane - correct answer.💖💖💖💖✔<<<<<in certain cells, the
phospholipids arrange themselves into the shape of a channel, in order to allow ions to transport across
the membrane
The isolation of different proteins to the luminal vs. basolateral surfaces of epithelial cells is due to the
presence of ____________ between the cells in the tissue
a) desmosomes
b) a pump
c) tight junctions
d) gap junctions - correct answer.💖💖💖💖✔<<<<<tight junctions
