$$ E = \frac{RT}{zF} \ln \left( \frac{[\text{ion}]_{\text{outside}}}{[\text{ion}]_{\text{inside}}} \right) $$

Question 1

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

Accepted Answer

To detect, integrate, and respond to internal and external stimuli

Question 2

Which structure is responsible for integrating and processing information in the central nervous system?

Accepted Answer

Brain

Question 3

The somatic and autonomic divisions of the peripheral nervous system differ primarily in:

Accepted Answer

The organs they innervate and the degree of voluntary control

Question 4

Which component of a neuron is primarily responsible for receiving incoming signals?

Accepted Answer

Dendrite

Question 5

A multipolar neuron is best suited for which function?

Accepted Answer

Integrating information within the CNS

Question 6

Which neuroglial cell forms the myelin sheath in the central nervous system?

Accepted Answer

Oligodendrocyte

Question 7

Which equation best represents the Nernst equation for calculating the equilibrium potential of an ion?

Accepted Answer

$$ E = \frac{RT}{zF} \ln \left( \frac{[	ext{ion}]_{	ext{outside}}}{[	ext{ion}]_{	ext{inside}}} ight) $$

Question 8

During the repolarization phase of an action potential, which ion movement is primarily responsible?

Accepted Answer

Efflux of K$$^+$$ ions

Question 9

A patient with multiple sclerosis experiences slowed neural conduction. Which property of axons is most affected?

Accepted Answer

Myelination

Question 10

Which of the following best explains why saltatory conduction is faster than continuous conduction?

Accepted Answer

Saltatory conduction allows action potentials to jump between nodes of Ranvier

Question 11

Which of the following is a key structural difference between electrical and chemical synapses?

Accepted Answer

Electrical synapses have gap junctions, chemical synapses have synaptic clefts

Question 12

Which event occurs first during chemical synaptic transmission?

Accepted Answer

Action potential arrives at the presynaptic terminal

Question 13

An excitatory postsynaptic potential (EPSP) is characterized by:

Accepted Answer

Depolarization of the postsynaptic membrane

Question 14

Temporal summation occurs when:

Accepted Answer

A single synapse is activated repeatedly in rapid succession

Question 15

Which neurotransmitter is most commonly inhibitory in the CNS?

Accepted Answer

GABA

Question 16

A neurotransmitter can be excitatory at one synapse and inhibitory at another because:

Accepted Answer

The postsynaptic receptor determines the effect

Question 17

Which of the following best defines a neuronal pool?

Accepted Answer

A collection of neurons that process specific types of information

Question 18

Which neural circuit type is best suited for amplifying a signal to multiple targets, such as in a reflex arc?

Accepted Answer

Diverging circuit

Question 19

A patient is given a drug that blocks voltage-gated Na$$^+$$ channels. What effect would this have on neuronal function?

Accepted Answer

Action potentials would be unable to initiate

Question 20

If a neuron receives both EPSPs and IPSPs simultaneously, what determines whether an action potential will be generated?

Accepted Answer

The sum of all postsynaptic potentials at the axon hillock

Introduction to the Nervous System and Nervous Tissue: Structured Study Notes

Study Guide - Practice Questions