Question 1

Which of the following best represents the integration function of the nervous system?

Accepted Answer

Deciding to slow down and pull your car over

Question 2

Which structure is responsible for forming myelin sheaths around CNS nerve fibers?

Accepted Answer

Oligodendrocytes

Question 3

In the diagram of the nervous system organization, which division is responsible for mobilizing body systems during activity?

Accepted Answer

Sympathetic division

Question 4

Which of the following is a major function of the myelin sheath?

Accepted Answer

Speeding up the conduction of nerve impulses

Question 5

Which neuron structure is most responsible for receiving information from other neurons?

Accepted Answer

Dendrites

Question 6

A voltmeter measures the resting membrane potential of a neuron as $$-70\ 	ext{mV}. $$What does the minus sign indicate?

Accepted Answer

The inside of the membrane is more negative than the outside

Question 7

Which type of membrane ion channel opens when a particular neurotransmitter binds to it?

Accepted Answer

Chemically gated channel

Question 8

According to Ohm’s law $$I = \frac{V}{R}$$, what happens to the current if resistance increases while voltage remains constant?

Accepted Answer

Current decreases

Question 9

Which neuron type is shown in the third neuron diagram (labeled C) and is characterized by a single axon and a single dendrite extending from opposite sides of the cell body?

Accepted Answer

Bipolar neuron

Question 10

Which of the following neurotransmitters is generally inhibitory?

Accepted Answer

Glycine

Question 11

A stimulus causes the membrane potential to change from $$-70\ 	ext{mV} to$$ $$-65\ 	ext{mV}. $$Does this change represent a depolarization or a hyperpolarization?

Accepted Answer

Depolarization

Question 12

Which type of graded potential is produced in a neuron that is stimulated by neurotransmitter released by another neuron?

Accepted Answer

Postsynaptic potential

Question 13

Which of the following occurs as the strength of a depolarizing stimulus increases?

Accepted Answer

Action potentials are generated more frequently.

Question 14

Which type of neurotransmitter receptor mediates fast synaptic transmission?

Accepted Answer

Channel-linked receptors

Question 15

In saltatory conduction, what is the importance of the myelin sheath gaps?

Accepted Answer

They allow the action potential to jump from gap to gap, increasing conduction speed.

Question 16

Which circuit pattern is described as an amplifying circuit with one input and many outputs?

Accepted Answer

Diverging circuit

Question 17

Which division of the nervous system is responsible for voluntary control of skeletal muscles?

Accepted Answer

Somatic nervous system

Question 18

Which neuron type is most abundant in the human body and is primarily involved in integration within the CNS?

Accepted Answer

Interneurons

Question 19

Which of the following best describes the relationship between current, voltage, and resistance in the nervous system?

Accepted Answer

Current is directly proportional to voltage and inversely proportional to resistance.

Question 20

Which type of neural processing is represented by the simple reflex arc?

Accepted Answer

Serial processing

Guided Study: Structural and Functional Organization of the Nervous System

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