Question 1

Which of the following best describes the integrative function of the nervous system?

Accepted Answer

Processing sensory information and making decisions about appropriate responses

Question 2

Which of the following correctly matches a structural division of the nervous system with its components?

Accepted Answer

Peripheral nervous system: sensory (afferent) and motor (efferent) divisions

Question 3

A neuron has a long axon, multiple dendrites, and a single cell body. Which structural classification does this neuron belong to?

Accepted Answer

Multipolar neuron

Question 4

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

Accepted Answer

Oligodendrocytes

Question 5

Which of the following best describes the difference between a nucleus and a ganglion?

Accepted Answer

A nucleus is a cluster of neuron cell bodies in the central nervous system, while a ganglion is in the peripheral nervous system.

Question 6

Which of the following ion channels opens in response to a change in membrane potential?

Accepted Answer

Voltage-gated channel

Question 7

The resting membrane potential of a typical neuron is approximately $$-70\ \mathrm{mV}. $$Which of the following best explains this value?

Accepted Answer

The membrane is more permeable to potassium ions than sodium ions, and the sodium-potassium pump maintains the gradient.

Question 8

Which of the following is an example of a graded potential?

Accepted Answer

End plate potential at the neuromuscular junction

Question 9

Which statement best distinguishes between graded potentials and action potentials?

Accepted Answer

Graded potentials decrease in strength as they spread, while action potentials do not diminish in amplitude.

Question 10

During the generation of an action potential, which event occurs first?

Accepted Answer

Sodium channels open, causing rapid depolarization

Question 11

A patient is unable to rapidly transmit nerve impulses along certain axons. Which structure is most likely damaged?

Accepted Answer

Myelin sheath

Question 12

Which of the following best describes saltatory conduction?

Accepted Answer

Action potentials jump from one node of Ranvier to the next, increasing conduction speed.

Question 13

Which of the following is true regarding the absolute refractory period?

Accepted Answer

No stimulus, no matter how strong, can initiate another action potential.

Question 14

Which of the following best explains why myelinated axons conduct impulses faster than unmyelinated axons?

Accepted Answer

Myelin allows action potentials to jump between nodes of Ranvier, reducing the number of action potentials needed.

Question 15

Which of the following is a functional classification of neurons based on the direction in which they transmit impulses?

Accepted Answer

Sensory (afferent) neuron

Question 16

A patient with multiple sclerosis experiences muscle weakness due to demyelination. Which process is most directly affected?

Accepted Answer

Saltatory conduction

Question 17

Which of the following best describes the role of astrocytes in the central nervous system?

Accepted Answer

Maintaining the blood-brain barrier and regulating the extracellular environment

Question 18

Which of the following best describes a tract in the nervous system?

Accepted Answer

A bundle of axons in the central nervous system

Question 19

If the resting membrane potential is $$-70\ \mathrm{mV}$$ and the threshold for action potential generation is $$-55\ \mathrm{mV}$$, what type of potential is a depolarization to $$-60\ \mathrm{mV}$$?

Accepted Answer

Graded potential

Question 20

A neuron receives multiple excitatory and inhibitory inputs at the same time. Which property of graded potentials allows the neuron to integrate these signals?

Accepted Answer

Summation

Chapter 11: Fundamentals of the Nervous System and Nervous Tissue – Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards