Question 1

Which of the following best describes the function of the blood-brain barrier (BBB)?

Accepted Answer

It restricts passage of harmful substances while allowing essential nutrients to pass into the CNS.

Question 2

A patient presents with loss of voluntary motor control on the right side of the body and impaired speech production. Which area of the brain is most likely affected?

Accepted Answer

Left frontal lobe, specifically Broca's area

Question 3

Which cranial nerve is responsible for transmitting visual information from the retina to the brain?

Accepted Answer

Optic nerve (II)

Question 4

Which of the following best explains why a lumbar puncture is typically performed between L3 and L4 vertebrae?

Accepted Answer

The spinal cord ends above this level, reducing risk of injury.

Question 5

A patient is unable to move their right eye laterally. Which cranial nerve is most likely damaged?

Accepted Answer

Abducens nerve (VI)

Question 6

Which of the following structures acts as the final relay and filtering point for ascending sensory information before it reaches the cerebral cortex?

Accepted Answer

Thalamus

Question 7

Which equation correctly represents the relationship between the volume, pressure, and flow of cerebrospinal fluid (CSF) in the brain?

Accepted Answer

$$ Q = \frac{\Delta P}{R} $$

Question 8

Damage to which part of the brain would most likely result in loss of coordination and balance?

Accepted Answer

Cerebellum

Question 9

Which of the following best describes the function of the dorsal root of a spinal nerve?

Accepted Answer

It carries sensory information into the spinal cord.

Question 10

A patient with damage to the Wernicke's area would most likely experience which of the following symptoms?

Accepted Answer

Difficulty understanding spoken and written language

Question 11

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of autonomic nervous system and endocrine system

Question 12

Which of the following best describes the pathway of sound from the external environment to the perception of sound in the brain?

Accepted Answer

External auditory canal → tympanic membrane → ossicles → cochlea → cochlear nerve → medulla → thalamus → temporal lobe

Question 13

Which of the following is TRUE regarding the organization of gray and white matter in the spinal cord?

Accepted Answer

Gray matter is located centrally in an H or butterfly shape, while white matter surrounds it.

Question 14

Which of the following best explains why referred pain occurs, such as pain from a heart attack being felt in the left shoulder and arm?

Accepted Answer

Sensory neurons from different regions converge on the same spinal cord segments.

Question 15

Which of the following cranial nerves is responsible for the sense of smell?

Accepted Answer

Olfactory nerve (I)

Question 16

A patient is unable to feel pain, temperature, or crude touch on the left side of their body below the neck. Which spinal tract is most likely damaged?

Accepted Answer

Right spinothalamic tract

Question 17

Which of the following best describes the function of the cerebellum?

Accepted Answer

Coordination of voluntary movements and balance

Question 18

Which of the following equations best represents Ohm's Law as it applies to nerve conduction?

Accepted Answer

$$ V = IR $$

Question 19

Which of the following is a function of the limbic system?

Accepted Answer

Regulation of emotions and memory formation

Question 20

Which of the following best describes the function of the reticular activating system (RAS)?

Accepted Answer

Regulation of consciousness and alertness

Central Nervous System, Special Senses, and Spinal Cord: A&P Study Guide

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