Question 1

Which of the following best describes the function of the white matter in the spinal cord?

Accepted Answer

It carries information from place to place within the central nervous system.

Question 2

A patient presents with a loss of sensation in a specific region of skin on the anterior thigh. Which structure is most likely damaged?

Accepted Answer

A dermatome associated with the lumbar plexus.

Question 3

Which meningeal layer is directly attached to the surface of the spinal cord and contains blood vessels supplying the cord?

Accepted Answer

Pia mater

Question 4

During a lumbar puncture, cerebrospinal fluid is withdrawn from which space?

Accepted Answer

Subarachnoid space

Question 5

Which of the following is a characteristic of a monosynaptic reflex?

Accepted Answer

It involves a single synapse between a sensory and a motor neuron.

Question 6

A person steps on a sharp object with their right foot. Which reflex ensures that the left leg straightens to support the body before the right foot is lifted?

Accepted Answer

Crossed extensor reflex

Question 7

Which of the following best describes the function of the Golgi tendon organ in the tendon reflex?

Accepted Answer

It detects excessive tension in tendons and inhibits muscle contraction.

Question 8

Which neural circuit pattern allows a single sensory input to produce multiple simultaneous responses, such as shifting weight, lifting a foot, and yelling in pain after stepping on a sharp object?

Accepted Answer

Parallel processing

Question 9

Which of the following statements about spinal nerves is correct?

Accepted Answer

They are formed by the union of anterior and posterior roots and are mixed nerves.

Question 10

A patient with carpal tunnel syndrome is most likely to experience sensory changes in areas supplied by which nerve?

Accepted Answer

Median nerve

Question 11

Which of the following best explains why the Babinski reflex is considered abnormal in adults?

Accepted Answer

It is a sign of CNS damage because descending inhibition is lost.

Question 12

Which of the following is the correct order of connective tissue layers from outermost to innermost in a peripheral nerve?

Accepted Answer

Epineurium, perineurium, endoneurium

Question 13

Which of the following best describes the function of the phrenic nerve?

Accepted Answer

It controls the diaphragm and is essential for breathing.

Question 14

Which of the following is a real-life example of an acquired reflex?

Accepted Answer

Braking a car quickly in response to an obstacle

Question 15

A patient has a viral infection that attacks the dorsal root ganglia, resulting in a painful rash along a specific dermatome. Which virus is most likely responsible?

Accepted Answer

Varicella-zoster virus

Question 16

Which of the following best describes the role of interneurons in a polysynaptic reflex?

Accepted Answer

They allow for complex responses by integrating and distributing information to multiple muscle groups.

Question 17

Which of the following equations best represents the relationship between the number of synapses in a reflex arc and the speed of the response?

Accepted Answer

$$t_{response} \propto n_{synapses}$$

Question 18

Which of the following is NOT a function of the spinal meninges?

Accepted Answer

Transmitting motor commands to peripheral effectors

Question 19

Which neural circuit pattern is most likely involved in maintaining consciousness through positive feedback loops?

Accepted Answer

Reverberation

Question 20

A patient is unable to maintain upright posture and has difficulty making fine adjustments to muscle tone. Which type of reflex is most likely impaired?

Accepted Answer

Postural reflexes

Study Guide: The Spinal Cord, Spinal Nerves, and Spinal Reflexes ch.13

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드