Question 1

Which type of sensory receptor is primarily responsible for detecting changes in blood pressure within the carotid sinus?

Accepted Answer

Mechanoreceptors

Question 2

A patient presents with loss of sensation on the anterior two-thirds of the tongue and decreased salivation. Which cranial nerve is most likely affected?

Accepted Answer

Facial nerve (CN VII)

Question 3

Which of the following best describes the order of a monosynaptic somatic reflex arc?

Accepted Answer

Receptor $$\rightarrow$$ Sensory neuron $$\rightarrow$$ Motor neuron $$\rightarrow$$ Effector

Question 4

Damage to which cranial nerve would most likely result in difficulty turning the head to the opposite side and shrugging the shoulders?

Accepted Answer

Accessory nerve (CN XI)

Question 5

A patient is unable to abduct their right eye, resulting in medial strabismus. Which cranial nerve is most likely damaged?

Accepted Answer

Abducens nerve (CN VI)

Question 6

Which of the following statements about nociceptors is correct?

Accepted Answer

They respond to potentially damaging stimuli that result in pain.

Question 7

Which pathway correctly describes the flow of sensory information from the periphery to the brain?

Accepted Answer

Receptor $$\rightarrow$$ Primary afferent neuron $$\rightarrow$$ Spinal cord $$\rightarrow$$ Thalamus $$\rightarrow$$ Cerebral cortex

Question 8

A patient experiences referred pain in the left arm during a heart attack. This phenomenon occurs because:

Accepted Answer

Visceral pain fibers travel along the same pathways as somatic pain fibers.

Question 9

Which of the following best explains why the withdrawal reflex is considered a polysynaptic reflex?

Accepted Answer

It involves multiple synapses, including interneurons, between sensory and motor neurons.

Question 10

If the dorsal root of a spinal nerve is severed, which function would be lost?

Accepted Answer

Sensory input from the body to the spinal cord

Question 11

Which cranial nerve is responsible for the majority of parasympathetic output to the thoracic and abdominal organs?

Accepted Answer

Vagus nerve (CN X)

Question 12

A patient presents with difficulty swallowing and hoarseness. Which cranial nerve is most likely affected?

Accepted Answer

Vagus nerve (CN X)

Question 13

Which of the following best describes the function of the muscle spindle in a stretch reflex?

Accepted Answer

It detects changes in muscle length and initiates a reflex contraction.

Question 14

Which of the following is a function of the trigeminal nerve (CN V)?

Accepted Answer

Sensory input from the face and motor control of mastication

Question 15

Which of the following best explains why the flexor (withdrawal) reflex is faster than the crossed extensor reflex?

Accepted Answer

The flexor reflex involves fewer synapses and a shorter pathway.

Question 16

Which of the following cranial nerves is purely sensory?

Accepted Answer

Olfactory nerve (CN I)

Question 17

A patient has difficulty moving the tongue and slurred speech. Which cranial nerve is most likely damaged?

Accepted Answer

Hypoglossal nerve (CN XII)

Question 18

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

Accepted Answer

It innervates the muscles and skin of the back.

Question 19

Which of the following is true regarding adaptation of sensory receptors?

Accepted Answer

Phasic receptors adapt rapidly to a constant stimulus.

Question 20

Which of the following best explains why the patellar (knee-jerk) reflex is used clinically?

Accepted Answer

It assesses the integrity of the spinal cord segments L2-L4.

CH 13

Study Guide - Practice Questions

Study Guide - Flashcards