Question 1

Which division of the nervous system is responsible for conducting sensory information from receptors to the central nervous system (CNS)?

Accepted Answer

Sensory (afferent) division

Question 2

A patient is unable to move their arm after a stroke. Which function of the nervous system has been disrupted?

Accepted Answer

Motor function

Question 3

Which type of glial cell is responsible for producing myelin in the central nervous system (CNS)?

Accepted Answer

Oligodendrocyte

Question 4

What is the main function of microglia in the CNS?

Accepted Answer

Perform immune defense functions

Question 5

Which of the following best describes the role of the axon in a neuron?

Accepted Answer

Conveys nerve impulses away from the cell body

Question 6

Which glial cell wraps myelin around axons in the peripheral nervous system (PNS)?

Accepted Answer

Schwann cell

Question 7

A neuron at rest has a membrane potential of $$-70\ \mathrm{mV}. $$What is the primary cause of this resting membrane potential?

Accepted Answer

Ionic imbalances, selective permeability, and the $$\mathrm{Na^+/K^+}$$ ATPase pump

Question 8

Which of the following ion channels opens in response to a neurotransmitter binding to its receptor?

Accepted Answer

Chemically-gated channel

Question 9

If sodium ions ($$\mathrm{Na^+}) $$move into a neuron, what effect does this have on the membrane potential?

Accepted Answer

Membrane potential becomes less negative (depolarization)

Question 10

Which of the following best describes the function of astrocytes in the CNS?

Accepted Answer

Regulate chemical environment and modulate capillary exchange

Question 11

A patient has a genetic disorder affecting the $$\mathrm{Na^+/K^+}$$ ATPase pump in neurons. Which of the following is most likely to occur?

Accepted Answer

Neurons will lose the ability to generate action potentials

Question 12

Which of the following is TRUE about the integrative function of the nervous system?

Accepted Answer

It is performed by interneurons within the CNS

Question 13

Which of the following is NOT a property of neurons?

Accepted Answer

Highly mitotic

Question 14

Which of the following best explains why myelination increases the speed of nerve impulse transmission?

Accepted Answer

Myelin electrically insulates axons and enables saltatory conduction at nodes of Ranvier

Question 15

Which of the following scenarios would most likely result in hyperpolarization of a neuron?

Accepted Answer

Opening of potassium channels

Question 16

A neuron receives a stimulus that causes its membrane potential to move from $$-70\ \mathrm{mV} to$$ $$-55\ \mathrm{mV}. $$What is this process called?

Accepted Answer

Depolarization

Question 17

Which of the following glial cells forms a permeable barrier between CNS tissue and cerebrospinal fluid (CSF)?

Accepted Answer

Ependymal cell

Question 18

Which of the following is TRUE regarding the direction of information flow in the nervous system?

Accepted Answer

Sensory (afferent) division carries information toward the CNS

Question 19

Which of the following best describes the function of satellite cells in the peripheral nervous system (PNS)?

Accepted Answer

Surround neuron cell bodies and regulate their environment

Question 20

A patient is exposed to a neurotoxin that blocks voltage-gated sodium channels. What is the most likely effect on neuronal function?

Accepted Answer

Neurons will be unable to depolarize and generate action potentials

Nervous System Tissue: Structure, Function, and Organization (Chapter 11 PP)

Guida di studio - Domande di pratica

Study guide - Flashcard