Question 1

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

Accepted Answer

To monitor internal and external environments, integrate information, and initiate appropriate responses.

Question 2

A patient presents with a loss of myelin in the central nervous system. Which cell type is most likely affected?

Accepted Answer

Oligodendrocytes

Question 3

Which of the following equations correctly represents the Nernst equation for calculating the equilibrium potential ($$E_{ion}) of an $$ion across a membrane?

Accepted Answer

$$E_{ion} = \frac{RT}{zF} \ln \left( \frac{[ion]_{out}}{[ion]_{in}} \right)$$

Question 4

Which neuroglia cell is responsible for phagocytosis of pathogens and debris in the central nervous system?

Accepted Answer

Microglia

Question 5

A nerve is to the peripheral nervous system as a tract is to the:

Accepted Answer

Central nervous system

Question 6

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 7

Which structural component of a neuron is primarily responsible for receiving signals from other neurons?

Accepted Answer

Dendrite

Question 8

Which of the following is a major difference between nuclei and ganglia?

Accepted Answer

Nuclei are clusters of neuron cell bodies in the central nervous system, while ganglia are in the peripheral nervous system.

Question 9

Which of the following neurotransmitters is classified as an amino acid?

Accepted Answer

Glutamate

Question 10

A neuron is classified as multipolar if it has:

Accepted Answer

One axon and multiple dendrites

Question 11

During an action potential, which ion is primarily responsible for depolarization of the neuron membrane?

Accepted Answer

Sodium ($$Na^+)$$

Question 12

Which of the following best describes the electrochemical basis of the resting membrane potential?

Accepted Answer

Active transport of sodium and potassium ions creates a voltage difference, with more negative charge inside the cell.

Question 13

Which scenario best illustrates the integration of synaptic events?

Accepted Answer

A neuron receives both excitatory and inhibitory inputs, and the sum of these determines whether an action potential is generated.

Question 14

Which of the following is true regarding chemical synapses?

Accepted Answer

They use neurotransmitters to transmit signals across a synaptic cleft.

Question 15

Which equation best represents the Goldman-Hodgkin-Katz equation for membrane potential ($$V_m$$)?

Accepted Answer

$$V_m = \frac{RT}{F} \ln \left( \frac{P_{K^+}[K^+]_{out} + P_{Na^+}[Na^+]_{out} + P_{Cl^-}[Cl^-]_{in}}{P_{K^+}[K^+]_{in} + P_{Na^+}[Na^+]_{in} + P_{Cl^-}[Cl^-]_{out}} \right)$$

Question 16

Which of the following best describes an inhibitory postsynaptic potential (IPSP)?

Accepted Answer

A postsynaptic membrane hyperpolarizes, decreasing the likelihood of an action potential.

Question 17

Which of the following is a functional division of the nervous system responsible for involuntary control of smooth muscle, cardiac muscle, and glands?

Accepted Answer

Autonomic nervous system

Question 18

A patient is diagnosed with a disorder affecting the Schwann cells. Which of the following is most likely to be impaired?

Accepted Answer

Myelination of axons in the peripheral nervous system

Question 19

Which scenario best illustrates the application of action potential propagation in a real-world medical context?

Accepted Answer

A patient with multiple sclerosis experiences slowed nerve conduction due to loss of myelin, resulting in impaired motor function.

Question 20

Which of the following is NOT a function of astrocytes?

Accepted Answer

Forming myelin in the peripheral nervous system

Chapter 11 Study Guide: The Nervous System and Nervous Tissues – Step-by-Step Guidance

Study Guide - Practice Questions

Study Guide - Flashcards