Question 1

Which of the following best describes the function of the thalamus in the diencephalon?

Accepted Answer

It relays all sensory signals to the cerebral cortex except olfactory signals.

Question 2

A patient presents with loss of proprioception and poor balance. Which structure is most likely affected?

Accepted Answer

Cerebellum

Question 3

Which of the following is TRUE regarding myelinated axons compared to unmyelinated axons?

Accepted Answer

Myelinated axons conduct impulses faster due to saltatory conduction.

Question 4

Which equation best represents the relationship between the number of synapses and the speed of a reflex arc?

Accepted Answer

$$Speed \propto \frac{1}{Number\ of\ Synapses}$$

Question 5

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of hunger, thirst, and sex sensations

Question 6

A lesion in the precentral gyrus would most likely result in which deficit?

Accepted Answer

Impaired voluntary motor control

Question 7

Which of the following best describes the difference between a nerve and a tract?

Accepted Answer

A tract is a bundle of axons in the CNS, while a nerve is a bundle of axons in the PNS.

Question 8

Which of the following is the correct order of structures that cerebrospinal fluid (CSF) flows through, starting from the lateral ventricles?

Accepted Answer

Lateral ventricles $$\rightarrow$$ Third ventricle $$\rightarrow$$ Cerebral aqueduct $$\rightarrow$$ Fourth ventricle

Question 9

Which of the following is a characteristic of multipolar neurons?

Accepted Answer

They have multiple dendrites and one axon.

Question 10

Which of the following best describes the function of the medulla oblongata?

Accepted Answer

It regulates vital autonomic functions such as heart rate and respiration.

Question 11

A patient has damage to the axon hillock of a neuron. Which process is most likely to be affected?

Accepted Answer

Initiation of action potentials

Question 12

Which of the following is TRUE about the arrangement of gray and white matter in the spinal cord?

Accepted Answer

Gray matter is located centrally, surrounded by white matter.

Question 13

Which of the following is a correct function of the cerebellum?

Accepted Answer

Coordination of muscle movements and balance

Question 14

Which of the following best describes the role of the synaptic knob?

Accepted Answer

It stores and releases neurotransmitters.

Question 15

Which of the following is a correct description of the function of the corpus callosum?

Accepted Answer

It connects the right and left cerebral hemispheres.

Question 16

Which of the following is TRUE regarding the difference between a gyrus and a sulcus?

Accepted Answer

A sulcus is a groove, while a gyrus is a ridge.

Question 17

Which of the following is a correct function of the autonomic nervous system (ANS)?

Accepted Answer

Regulation of involuntary functions such as heart rate and digestion

Question 18

Which of the following best describes the difference between the sympathetic and parasympathetic divisions of the ANS?

Accepted Answer

Sympathetic division promotes fight or flight; parasympathetic division promotes rest and digestion.

Question 19

Which of the following is a correct description of the function of oligodendrocytes?

Accepted Answer

They produce myelin sheaths in the central nervous system.

Question 20

A patient has damage to the postcentral gyrus. Which function is most likely impaired?

Accepted Answer

Somatosensory perception

Nervous System: Structure, Function, and Organization (Chapters 12 & 13 Study Guide)

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