Question 1

Which type of sensory receptor is primarily responsible for detecting changes in muscle length and tension, and where are these receptors typically located?

Accepted Answer

Proprioceptors; located in skeletal muscles, tendons, and joints

Question 2

A patient presents with loss of sensation in the skin over the lateral forearm. Which nerve plexus is most likely affected?

Accepted Answer

Brachial plexus

Question 3

Which of the following best describes the difference between spinal nerve roots and rami?

Accepted Answer

Roots are medial and form spinal nerves, each root is purely sensory or motor; rami are distal, lateral branches carrying both sensory and motor fibers

Question 4

If both phrenic nerves are severed, which physiological consequence is most likely to occur?

Accepted Answer

Paralysis of the diaphragm and respiratory arrest

Question 5

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

Accepted Answer

Optic nerve (II)

Question 6

A patient has difficulty swallowing and loss of taste from the posterior third of the tongue. Which cranial nerve is most likely damaged?

Accepted Answer

Glossopharyngeal nerve (IX)

Question 7

Which of the following is a correct sequence for the neural pathway of a somatic reflex arc?

Accepted Answer

Receptor → Sensory neuron → Integration center → Motor neuron → Effector

Question 8

Which aspect of sensory perception allows a person to identify the site or pattern of a stimulus, such as in a two-point discrimination test?

Accepted Answer

Spatial discrimination

Question 9

Which equation best represents the relationship between stimulus intensity and frequency of action potentials in sensory neurons?

Accepted Answer

$$f = k 	imes I$$

Question 10

A patient experiences referred pain in the left arm during a heart attack. Which statement best explains this phenomenon?

Accepted Answer

Visceral and somatic pain fibers converge on the same spinal nerves, causing the brain to misinterpret the source of pain

Question 11

Which nerve plexus is responsible for innervating the major muscle of breathing, and which spinal nerves contribute to it?

Accepted Answer

Cervical plexus; C3–C5

Question 12

Which of the following is true regarding the organization of spinal nerves?

Accepted Answer

Spinal nerves are mixed nerves, supplying all body parts except the head and part of the neck

Question 13

Which of the following best describes the function of the tendon reflex?

Accepted Answer

It produces muscle relaxation in response to tension, preventing damage from excessive stretch

Question 14

Which cranial nerve is primarily responsible for hearing and equilibrium?

Accepted Answer

Vestibulocochlear nerve (VIII)

Question 15

A patient has lost the ability to move their lateral rectus muscle of the eye. Which cranial nerve is most likely damaged?

Accepted Answer

Abducens nerve (VI)

Question 16

Which of the following statements about dermatomes is correct?

Accepted Answer

Most dermatomes overlap, so destruction of a single spinal nerve will not cause complete numbness

Question 17

Which of the following is NOT a function of the somatosensory system?

Accepted Answer

Controlling voluntary movement of skeletal muscles

Question 18

Which equation best represents the relationship for spatial discrimination in the two-point discrimination test?

Accepted Answer

$$d = \frac{1}{n}$$, where $$d is $$the minimum distance and $$n is $$the density of sensory receptors

Question 19

Which of the following is a learned (acquired) reflex?

Accepted Answer

Driving skills

Question 20

Which of the following best describes the role of the integration center in a reflex arc?

Accepted Answer

It is the site where sensory and motor neurons synapse, and can be monosynaptic or polysynaptic

Nurs 1002-Obj #13

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