Question 1

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

Accepted Answer

It acts as the major relay station for sensory information, filtering and routing signals to the appropriate cortical areas.

Question 2

A patient suffers a stroke affecting the left precentral gyrus. Which of the following symptoms is most likely to occur?

Accepted Answer

Paralysis of voluntary movement on the right side of the body.

Question 3

Damage to the somatosensory association cortex would most likely result in which clinical condition?

Accepted Answer

Astereognosis (tactile agnosia): inability to recognize objects by touch despite normal sensation.

Question 4

Which structure is responsible for producing melatonin and regulating circadian rhythms?

Accepted Answer

Pineal gland

Question 5

The motor homunculus represents body parts according to:

Accepted Answer

The precision and amount of motor control required for each region.

Question 6

Which of the following best explains why the cerebral cortex is considered the 'executive suite' of the brain?

Accepted Answer

It performs higher brain functions such as conscious thought, reasoning, memory, and voluntary movement.

Question 7

Which of the following fiber types connects the left and right cerebral hemispheres?

Accepted Answer

Commissural fibers

Question 8

A patient with damage to Broca's area will most likely experience:

Accepted Answer

Impaired ability to produce speech, despite knowing what they want to say.

Question 9

Which of the following is TRUE regarding the flow of cerebrospinal fluid (CSF)?

Accepted Answer

CSF flows from the lateral ventricles through the interventricular foramina to the third ventricle.

Question 10

Which brain region is primarily responsible for regulating heart rate, blood pressure, and basic respiratory rhythm?

Accepted Answer

Medulla oblongata

Question 11

Which of the following best describes the function of the basal nuclei?

Accepted Answer

Regulate and smooth voluntary movement, suppress unwanted movements, and help maintain muscle tone.

Question 12

Which of the following is a consequence of cerebellar damage?

Accepted Answer

Loss of coordinated movement, intention tremor, and ataxia.

Question 13

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

Accepted Answer

Gray matter forms the central 'H' or butterfly shape, surrounded by white matter.

Question 14

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

Accepted Answer

It maintains alertness, wakefulness, and filters incoming sensory information.

Question 15

Which lobe of the cerebral hemisphere is primarily responsible for vision?

Accepted Answer

Occipital lobe

Question 16

Which of the following is TRUE regarding the function of the hypothalamus?

Accepted Answer

It regulates homeostasis, controls the autonomic nervous system, endocrine function, hunger, thirst, and body temperature.

Question 17

Which of the following best explains why the left cerebral hemisphere is considered dominant in most people?

Accepted Answer

It specializes in language, logic, mathematics, and analytical thinking.

Question 18

Which of the following is TRUE regarding the pathway of voluntary movement?

Accepted Answer

Commands originate in the primary motor cortex, travel via pyramidal cells through corticospinal tracts, and activate lower motor neurons in the spinal cord.

Question 19

Which of the following is TRUE regarding the sensory homunculus?

Accepted Answer

Body regions are represented according to the density of sensory receptors and sensitivity.

Question 20

Which of the following equations correctly represents the relationship between body temperature regulation and hypothalamic function?

Accepted Answer

If $$T_{body} \u003e 37\ ^\circ \mathrm{C}$$, hypothalamus stimulates sweating and vasodilation; if $$T_{body} \u003c 37\ ^\circ \mathrm{C}$$, hypothalamus stimulates shivering and vasoconstriction.

Chapter 12: The Central Nervous System – Brain Structure and Function

Study Guide - Practice Questions

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