BIOL 3204 FINAL EXAM QUESTIONS & ANSWERS
Which of the following statements are TRUE for movement across membranes:
1. facilitated diffusion is passive and occurs with net movement of molecules from high
to low concentration with the aid of membrane-spanning proteins (i.e., channels)
2. osmosis is passive and occurs with net water movement from low solute to high
solute concentration
3. active transport requires energy from ATP in order to occur
4. diffusion occurs more quickly at higher temperatures than at lower temperatures
a. all of the above are TRUE
b. none of the above are TRUE
c. 1 and 2 are TRUE
d. 2 and 3 are TRUE
e. 3 and 4 are TRUE - Answer -A
Which of the following are TRUE concerning neuron anatomy/physiology:
1. fast axonal transport moves cell components between the cell body and axon
terminals
2. action potentials are produced when graded potentials exceed threshold at the axon
hillock (trigger zone)
3. graded potentials can be excitatory or inhibitory
4. myelin sheaths are made by oligodendrocytes and astrocytes
5. axons with larger diameter conduct action potentials more slowly than axons with
smaller diameter
a. all of the above are TRUE
b. none of the above are TRUE
c. 1, 2, and 3 are TRUE
d. 3, 4, and 5 are TRUE
e.1, 3, and 5 are TRUE - Answer -C
Which of the following statements are TRUE regarding vision:
1.The iris controls lens shape
2.The ciliary body controls pupil diameter
3.The iris is made of skeletal muscle and the ciliary body is made of smooth muscle
4.The optic nerve (cranial nerve II) controls both the iris and the ciliary body
a. all of the above are TRUE
b. none of the above are TRUE
c. 1 and 2 are TRUE
d. 3 and 4 are TRUE - Answer -B
Which of the following are TRUE about the nephron of the kidney:
1. filtration only occurs in the distal tubule
, 2. excretion only occurs in the proximal tubule
3. there is a portal vessel system connecting capillaries in Bowman's capsule and
around the loop of Henle
4. descending loop of Henle is permeable only to water and the ascending loop is
permeable only to solutes
5. under typical conditions, the greatest volume of water reabsorption occurs in the
collecting duct
a. all of the above are TRUE
b. 1 and 2 are TRUE
c. 3 and 4 are TRUE
d. 1, 3, and 5 are TRUE
e. 2,4, and 5 are TRUE - Answer -C
Homeostasis:
a. is the maintenance of relatively constant body conditions in spite of changes in the
external environment
b. is a concept that was largely developed from the work of Claude Bernard
c. is a fundamental difference between living and non-living things
d. all of the above
e. none of the above - Answer -D
Regarding negative feedback and positive feedback:
a. an example of negative feedback given in class is the action of parathyroid hormone
b. an example of positive feedback given in class is childbirth
c. negative feedback is the mechanism primarily used to maintain homeostasis
d. all of the above
e. none of the above - Answer -D
Regarding the blood-brain barrier:
a. it is highly selectively permeable
b. small gases like O2 and CO2 can cross it via diffusion
c. glucose, which is required by the brain for energy, is able to cross it using membrane
transport proteins
d. all of the above
e. none of the above - Answer -D
Which of the following is/are TRUE regarding learning and memory:
a. memory consolidation appears to be related to the physiological process of long-term
potentiation
b. hormones play a role in whether memories will be created, primarily epinephrine and
glucocorticoids
c. glucose transport across the blood-brain barrier may be the mechanism by which
hormones exert their effect on learning and memory
d. all of the above are TRUE
Which of the following statements are TRUE for movement across membranes:
1. facilitated diffusion is passive and occurs with net movement of molecules from high
to low concentration with the aid of membrane-spanning proteins (i.e., channels)
2. osmosis is passive and occurs with net water movement from low solute to high
solute concentration
3. active transport requires energy from ATP in order to occur
4. diffusion occurs more quickly at higher temperatures than at lower temperatures
a. all of the above are TRUE
b. none of the above are TRUE
c. 1 and 2 are TRUE
d. 2 and 3 are TRUE
e. 3 and 4 are TRUE - Answer -A
Which of the following are TRUE concerning neuron anatomy/physiology:
1. fast axonal transport moves cell components between the cell body and axon
terminals
2. action potentials are produced when graded potentials exceed threshold at the axon
hillock (trigger zone)
3. graded potentials can be excitatory or inhibitory
4. myelin sheaths are made by oligodendrocytes and astrocytes
5. axons with larger diameter conduct action potentials more slowly than axons with
smaller diameter
a. all of the above are TRUE
b. none of the above are TRUE
c. 1, 2, and 3 are TRUE
d. 3, 4, and 5 are TRUE
e.1, 3, and 5 are TRUE - Answer -C
Which of the following statements are TRUE regarding vision:
1.The iris controls lens shape
2.The ciliary body controls pupil diameter
3.The iris is made of skeletal muscle and the ciliary body is made of smooth muscle
4.The optic nerve (cranial nerve II) controls both the iris and the ciliary body
a. all of the above are TRUE
b. none of the above are TRUE
c. 1 and 2 are TRUE
d. 3 and 4 are TRUE - Answer -B
Which of the following are TRUE about the nephron of the kidney:
1. filtration only occurs in the distal tubule
, 2. excretion only occurs in the proximal tubule
3. there is a portal vessel system connecting capillaries in Bowman's capsule and
around the loop of Henle
4. descending loop of Henle is permeable only to water and the ascending loop is
permeable only to solutes
5. under typical conditions, the greatest volume of water reabsorption occurs in the
collecting duct
a. all of the above are TRUE
b. 1 and 2 are TRUE
c. 3 and 4 are TRUE
d. 1, 3, and 5 are TRUE
e. 2,4, and 5 are TRUE - Answer -C
Homeostasis:
a. is the maintenance of relatively constant body conditions in spite of changes in the
external environment
b. is a concept that was largely developed from the work of Claude Bernard
c. is a fundamental difference between living and non-living things
d. all of the above
e. none of the above - Answer -D
Regarding negative feedback and positive feedback:
a. an example of negative feedback given in class is the action of parathyroid hormone
b. an example of positive feedback given in class is childbirth
c. negative feedback is the mechanism primarily used to maintain homeostasis
d. all of the above
e. none of the above - Answer -D
Regarding the blood-brain barrier:
a. it is highly selectively permeable
b. small gases like O2 and CO2 can cross it via diffusion
c. glucose, which is required by the brain for energy, is able to cross it using membrane
transport proteins
d. all of the above
e. none of the above - Answer -D
Which of the following is/are TRUE regarding learning and memory:
a. memory consolidation appears to be related to the physiological process of long-term
potentiation
b. hormones play a role in whether memories will be created, primarily epinephrine and
glucocorticoids
c. glucose transport across the blood-brain barrier may be the mechanism by which
hormones exert their effect on learning and memory
d. all of the above are TRUE
