Question 1

Which of the following best describes the primary function of the myelin sheath in the nervous system?

Accepted Answer

To increase the speed of action potential conduction along the axon by insulating the nerve fiber.

Question 2

A patient presents with loss of pain and temperature sensation on the right side of the body and paralysis on the left side after a spinal cord injury. Which spinal cord tract is most likely damaged?

Accepted Answer

The left lateral corticospinal tract.

Question 3

Which neuroglial cell is responsible for forming the blood-brain barrier?

Accepted Answer

Astrocyte

Question 4

During the generation of an action potential, which ion movement is primarily responsible for the depolarization phase?

Accepted Answer

Influx of $$\mathrm{Na^+}$$ ions into the neuron

Question 5

Which of the following best explains why damage to the left primary motor cortex results in paralysis on the right side of the body?

Accepted Answer

Most motor fibers decussate (cross) at the medullary pyramids, causing contralateral control.

Question 6

Which cranial nerve is tested by asking a patient to identify different odors and is responsible for the sense of smell?

Accepted Answer

Olfactory nerve (Cranial Nerve I)

Question 7

A patient with a lesion in the Wernicke's area would most likely exhibit which of the following symptoms?

Accepted Answer

Fluent but nonsensical speech and impaired language comprehension.

Question 8

Which of the following best describes the difference between the sympathetic and parasympathetic divisions of the autonomic nervous system?

Accepted Answer

The sympathetic division prepares the body for 'fight or flight,' while the parasympathetic division promotes 'rest and digest' activities.

Question 9

Which structure is responsible for the production of cerebrospinal fluid (CSF)?

Accepted Answer

Choroid plexus

Question 10

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

Accepted Answer

Abducens nerve (Cranial Nerve VI)

Question 11

Which of the following best describes the arrangement of gray and white matter in the spinal cord?

Accepted Answer

Gray matter is located centrally in an H-shaped pattern, surrounded by white matter.

Question 12

Which of the following is the correct sequence for the flow of aqueous humor in the eye?

Accepted Answer

Ciliary body $$\rightarrow$$ posterior chamber $$\rightarrow$$ pupil $$\rightarrow$$ anterior chamber $$\rightarrow$$ canal of Schlemm

Question 13

Which of the following best explains the anatomical basis of myopia (nearsightedness)?

Accepted Answer

The eyeball is too long, causing light to focus in front of the retina.

Question 14

Which of the following is a function of the reticular activating system (RAS)?

Accepted Answer

Regulation of consciousness and alertness.

Question 15

Which of the following best describes the function of the organ of Corti?

Accepted Answer

It contains hair cells that transduce sound vibrations into nerve impulses.

Question 16

A patient with damage to the right optic tract will most likely experience which visual deficit?

Accepted Answer

Loss of vision in the left visual field of both eyes.

Question 17

Which of the following best describes the difference between rods and cones in the retina?

Accepted Answer

Rods are more sensitive to low light and are responsible for night vision, while cones detect color and are concentrated in the fovea.

Question 18

Which of the following is the correct order of structures that a sound wave passes through from the external environment to the cochlear nerve?

Accepted Answer

Auricle $$\rightarrow$$ external auditory meatus $$\rightarrow$$ tympanic membrane $$\rightarrow$$ ossicles $$\rightarrow$$ oval window $$\rightarrow$$ cochlea $$\rightarrow$$ organ of Corti $$\rightarrow$$ cochlear nerve

Question 19

Which of the following best describes the effect of the parasympathetic nervous system on the heart?

Accepted Answer

It decreases heart rate via the vagus nerve.

Comprehensive Study Guide: Nervous System, Special Senses (Vision & Audition) – Anatomy & Physiology I

Study Guide - Practice Questions

Study Guide - Flashcards