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BIOL 2311 – Exam 4 (47 questions; max score: 110 out of 100 points) Answered Fall 2024/2025.

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NAME: BIOL 2311 – Exam 4 (47 questions; max score: 110 out of 100 points) Multiple choice questions. (40 points). Select a single answer per question. Each question is worth 1 pt. 1. The _______________ is the way by which the CNS determines stimulus intensity. a. action potential strength ...

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NAME: Lourdes Chico

BIOL 2311 – Exam 4 (47 questions; max score: 110 out of 100 points)

Multiple choice questions. (40 points). Select a single answer per question. Each question is worth 1 pt.

1. The _______________ is the way by which the CNS determines stimulus intensity.
a. action potential strength
b. action potential frequency
c. action potential threshold
d. a and b
e. a and c

2. Which of the following statements relating to memory consolidation is incorrect?
a. it is the process by which STM is converted to LTM
b. it is most effective when a person is highly alert and unmotivated
c. it is augmented by repetition and practice
d. a and b
e. a and c

3. The _______________ is the period where no other AP can be generated.
a. relative refractory period
b. absolute refractory period
c. all-or-none period
d. a and b
e. b and c

4. Which of the following is the key driver for the fusion of neurotransmitter-containing synaptic vesicles with
the axonal membrane causing neurotransmitter exocytosis?
a. neurotransmitter binding to postsynaptic receptors
b. calcium ions binding to synaptotagmin
c. AP activating ligand-gated calcium channels
d. a and b
e. b and c

5. All fibers in the cerebrum are _______________ while the fibers in the cerebellum are _______________.
a. ipsilateral; contralateral
b. contralateral; ipsilateral
c. contralateral; contralateral
d. ipsilateral; ipsilateral
e. none of the above

6. A patient with damaged ventral horn cells exhibit:
a. flaccid paralysis
b. no voluntary control of muscles
c. no reflex activity
d. a and b
e. a, b, and c
This study source was downloaded by 100000892213116 from CourseHero.com on 10-11-2024 06:07:57 GMT -05:00

https://www.coursehero.com/file/240317087/BIOL-2311-Exam-4pdf/

, 7. Neurotransmitter actions are quickly terminated. Which of the following is not a mode of termination?
a. enzymatic degradation
b. reuptake by transporters
c. diffusion away from synapse
d. all of the above
e. none of the above

8. Which of the following statements relating to transection is accurate?
a. results in partial motor loss inferior to the cut
b. causes partial sensory loss below the cut
c. cut at the lumber region of spinal cord causes quadriplegia
d. cut at the cervical region of spinal cord causes paraplegia
e. none of the above

9. In an inhibitory synapse, neurotransmitter binding to a receptor cause opening of __________ resulting in a
hyperpolarizing event and reduces likelihood of AP generation.
a. sodium ion channels
b. potassium ion channels
c. chloride ion channels
d. a and b
e. b and c

10. Which of the following statements relating to cerebrovascular accidents is false?
a. it is commonly known as strokes
b. it can lead to hemiplegia
c. it can be treated via tissue plasminogen activator
d. all of the above
e. none of the above

11. Which sensory area cortex is mainly responsible for conscious awareness of balance?
a. auditory areas
b. olfactory cortex
c. gustatory cortex
d. vestibular cortex
e. a and d

12. Which of the following statements about postsynaptic potentials (PSPs) strength is correct?
a. they are graded potentials
b. it is determined AP frequency
c. it is determined by transporters and enzymes
d. b and c
e. a, b, and c

13. Which of the following protective structures is present in the brain but not in the spinal cord?
a. bone
b. meninges
c. CSF
d. BBB
e. none of the above
This study source was downloaded by 100000892213116 from CourseHero.com on 10-11-2024 06:07:57 GMT -05:00

https://www.coursehero.com/file/240317087/BIOL-2311-Exam-4pdf/

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