Question 1

Which of the following best describes the function of proprioceptors?

Accepted Answer

They are mechanoreceptors that detect stretch in muscles, tendons, or joint capsules, providing information about body position and movement.

Question 2

A patient is unable to feel light touch on their fingertips but can still sense pain and temperature. Which sensory receptor is most likely damaged?

Accepted Answer

Meissner's corpuscle

Question 3

Which neurotransmitter is released at the neuromuscular junction to stimulate skeletal muscle contraction?

Accepted Answer

Acetylcholine

Question 4

Which of the following is a correct pathway for a somatic sensory signal from the skin to the CNS?

Accepted Answer

Sensory receptor → Sensory neuron → Dorsal root ganglion → Spinal cord

Question 5

Which division of the peripheral nervous system (PNS) is responsible for motor innervation of smooth muscle, cardiac muscle, and glands?

Accepted Answer

Visceral motor division (Autonomic Nervous System)

Question 6

A person is experiencing increased heart rate, dilated pupils, and decreased digestive activity. Which division of the autonomic nervous system is primarily responsible for these effects?

Accepted Answer

Sympathetic division

Question 7

Which of the following best explains why the parasympathetic division has long preganglionic and short postganglionic fibers with little branching?

Accepted Answer

This division controls localized, non-emergency functions that do not require simultaneous activation of many organs.

Question 8

Which of the following is a function of the somatic sensory division?

Accepted Answer

Detecting touch, pain, pressure, vibration, temperature, and proprioception in skin, body wall, and limbs

Question 9

A patient with damage to the dorsal root of a spinal nerve would most likely experience which of the following symptoms?

Accepted Answer

Loss of sensory input from the affected region

Question 10

Which of the following best describes the organization of a motor unit?

Accepted Answer

One somatic motor neuron and all the skeletal muscle fibers it innervates

Question 11

Which type of receptor is responsible for detecting changes in temperature throughout the body?

Accepted Answer

Thermoreceptor

Question 12

Which of the following is true regarding the neurotransmitters released by the sympathetic division of the autonomic nervous system?

Accepted Answer

Preganglionic neurons release acetylcholine; postganglionic neurons release norepinephrine.

Question 13

A patient presents with loss of function in all four limbs and difficulty breathing. Damage to which region of the spinal cord is most likely responsible?

Accepted Answer

Above the level of C4

Question 14

Which of the following best describes the difference between the somatic and autonomic motor pathways?

Accepted Answer

Somatic motor pathways use a single neuron from the CNS to the effector, while autonomic motor pathways use two neurons (preganglionic and postganglionic).

Question 15

Which of the following is a real-life example of a mechanoreceptor at work?

Accepted Answer

Feeling the vibration of your phone in your pocket

Question 16

Which of the following best explains the clinical significance of dermatomes?

Accepted Answer

They help clinicians determine the level of spinal cord injury by mapping sensory loss to specific spinal nerves.

Question 17

Which of the following is a correct statement about the parasympathetic division of the autonomic nervous system?

Accepted Answer

It has long preganglionic and short postganglionic fibers with limited branching.

Question 18

A person is quietly reading a book after a large meal. Which division of the autonomic nervous system is primarily controlling digestion?

Accepted Answer

Parasympathetic division

Question 19

Which of the following best describes the function of nociceptors?

Accepted Answer

They are free nerve endings that respond to potentially damaging stimuli by sending pain signals to the CNS.

Peripheral Nervous System: Functional and Structural Organization

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