Question 1

Which of the following is NOT a basic function of the nervous system?

Accepted Answer

Production of hormones

Question 2

The structural division of the nervous system that includes the brain and spinal cord is called:

Accepted Answer

Central nervous system

Question 3

Which part of the neuron is primarily responsible for receiving signals from other neurons?

Accepted Answer

Dendrite

Question 4

A neuron that transmits impulses from sensory receptors to the central nervous system is classified as:

Accepted Answer

Sensory neuron

Question 5

Which type of neuroglia forms the myelin sheath in the central nervous system?

Accepted Answer

Oligodendrocytes

Question 6

What is the primary function of the myelin sheath?

Accepted Answer

To increase the speed of nerve impulse conduction

Question 7

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

Accepted Answer

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

Question 8

Which type of membrane ion channel opens in response to a change in membrane potential?

Accepted Answer

Voltage-gated channel

Question 9

The resting membrane potential of a typical neuron is approximately:

Accepted Answer

$$-70\ 	ext{mV}$$

Question 10

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

Accepted Answer

Excitatory postsynaptic potential (EPSP)

Question 11

Which statement best distinguishes graded potentials from action potentials?

Accepted Answer

Graded potentials decrease in strength with distance, while action potentials do not.

Question 12

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

Accepted Answer

Sodium channels open

Question 13

The absolute refractory period is defined as:

Accepted Answer

The period when no action potential can be generated, regardless of stimulus strength

Question 14

Saltatory conduction occurs in neurons that:

Accepted Answer

Have myelinated axons

Question 15

Which equation best represents the electrochemical basis of the resting membrane potential?

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

A patient with multiple sclerosis is experiencing slowed nerve conduction. Which structure is most likely damaged?

Accepted Answer

Myelin sheath

Question 17

Which of the following best describes continuous conduction?

Accepted Answer

Action potentials propagate along unmyelinated axons

Question 18

If a neuron is in the relative refractory period, what must occur for another action potential to be generated?

Accepted Answer

A stronger-than-normal stimulus is required

Question 19

Which of the following is a real-life example of saltatory conduction?

Accepted Answer

Rapid reflexes in myelinated motor neurons

Question 20

A tract in the nervous system is best defined as:

Accepted Answer

A bundle of axons in the central nervous system

Nervous System and Nervous Tissue: Study Guide (CH 11)

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