Question 1

Which structure in the neuron is primarily responsible for receiving incoming signals from other neurons?

Accepted Answer

Dendrites

Question 2

Which type of neuroglia is responsible for forming the myelin sheath in the central nervous system (CNS)?

Accepted Answer

Oligodendrocytes

Question 3

During the repolarization phase of an action potential, which ion channel opens to restore the membrane potential?

Accepted Answer

Voltage-gated K$$^+$$ channels

Question 4

Which of the following best describes saltatory conduction?

Accepted Answer

Action potentials jump from node to node along myelinated axons

Question 5

A patient presents with a loss of fine motor control and balance. Which brain structure is most likely affected?

Accepted Answer

Cerebellum

Question 6

Which of the following is a function of the astrocytes in the CNS?

Accepted Answer

Maintaining the blood-brain barrier

Question 7

Which neurotransmitter is primarily released by postganglionic sympathetic fibers?

Accepted Answer

Norepinephrine

Question 8

Which lobe of the brain is primarily responsible for processing visual information?

Accepted Answer

Occipital lobe

Question 9

A reflex arc typically involves which sequence of events?

Accepted Answer

Stimulus → Sensory neuron → CNS processing → Motor neuron → Response

Question 10

Which of the following best explains why action potentials only move forward along an axon?

Accepted Answer

The absolute refractory period prevents backward propagation

Question 11

Which structure produces cerebrospinal fluid (CSF) in the brain?

Accepted Answer

Choroid plexus

Question 12

Which type of neuron is most commonly found in the central nervous system and is characterized by multiple dendrites and a single axon?

Accepted Answer

Multipolar neuron

Question 13

Which ion is primarily responsible for the hyperpolarization phase of an action potential?

Accepted Answer

K$$^+$$

Question 14

Which division of the autonomic nervous system is responsible for 'rest and digest' functions?

Accepted Answer

Parasympathetic division

Question 15

Where are the cell bodies of sensory neurons located in the spinal cord?

Accepted Answer

Spinal ganglion (dorsal root ganglion)

Question 16

Which of the following best describes the function of the thalamus?

Accepted Answer

Relay center for all sensory information except olfactory

Question 17

A patient is unable to increase their heart rate in response to stress. Which division of the nervous system is most likely impaired?

Accepted Answer

Sympathetic division

Question 18

Which of the following is TRUE regarding the refractory periods of an action potential?

Accepted Answer

During the relative refractory period, a stronger stimulus is required to trigger another action potential

Question 19

Which of the following best describes the role of the corpus callosum?

Accepted Answer

Connects the two cerebral hemispheres

Question 20

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

Accepted Answer

The sensory neuron synapses directly on the motor neuron

Study Guide: The Nervous System (Anatomy & Physiology)

스터디 가이드 - 연습 문제