Chapter Seven

Question 0

Neuron process that carries impulses away from the nerve cell body; efferent process; the conducting portion of a nerve cell.

Answer 0

Axon

Question 1

Nerve cells that carry impulses toward the central nervous system.

Answer 1

Afferent Neuron

Question 2

The division of the nervous system that functions involuntarily; innervates cardiac muscle, smooth muscle, and glands.

Answer 2

Autonomic Nervous System

Question 3

The portion of the brain consisting of the medulla, pons, and midbrain.

Answer 3

Brain Stem

Question 4

The brain and the spinal cord

Answer 4

Central Nervous System

Question 5

Part of the hindbrain; involved in producing smoothly coordinated skeletal muscle activity.

Answer 5

Cerebellum

Question 6

The fluid produced in the cerebral ventricles; fills the ventricles and surrounds the central nervous system.

Answer 6

Cerebrospinal Fluid

Question 7

Most superior part of the brain and together are a good deal larger than the other three regions of the brain combined.

Answer 7

Cerebral Hemisphere

Question 8

the branching extensions of neurons that carry electrical signals to the cell body; the receptive portion of a nerve cell.

Answer 8

Dendrites

Question 9

The loss of a state of polarity; the loss of a negative charge inside the plasma membrane

Answer 9

Depolarization

Question 10

Neurons that conduct impulses away from the central nervous system

Answer 10

Efferent Neuron

Question 11

A group of nerve cell bodies located in the peripheral nervous system

Answer 11

Ganglion

Question 12

The gray area of the central nervous system; contains unmyelinated nerve fibers and nerve cell bodies.

Answer 12

Gray Matter

Question 13

Also called association neurons; completes the pathway between afferent and efferent neurons

Answer 13

Interneurons

Question 14

The membranes that cover the brain

Answer 14

Meninges

Question 15

A white, fatty lipid substance

Answer 15

Myelin

Question 16

Bundle of neuron processes outside the central nervous systems

Answer 16

Nerve

Question 17

The nonneuronal tissue of the central nervous system that performs supportive and other functions; also called glia

Answer 17

Neuroglia

Question 18

Cells of the nervous system specialized to transmit messages throughout the body.

Answer 18

Neurons

Question 19

Gap of myelin sheath of a nerve, between adjacent Schwann cells.

Answer 19

Nodes of Ranvier

Question 20

The nervous system outside the brain and spinal cord.

Answer 20

Peripheral Nervous System

Question 21

A network of vessels in the body

Answer 21

Plexus

Question 22

Electrical difference across cell membrane. Can be measured by putting thin electrode inside a cell.

Answer 22

Polarization

Question 23

Monitors changes in a controlled condition and sends input to control center

Answer 23

Receptor

Question 24

An action that is performed as a response to a stimulus and without conscious though.

Answer 24

Reflex

Question 25

Refers to the change in membrane potential that returns it to a negative value just after the depolarization phase of an action potential has changed the membrane potential to a positive value.

Answer 25

Repolarization

Question 26

Voluntary nervous system. Part of the peripheral nervous system associated with skeletal muscle voluntary control of body movements. Consists of afferent and efferent nerves.

Answer 26

Somatic Nervous System

Question 27

A junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.

Answer 27

Synapse

Question 28

A paler tissue of the brain and spinal cord, consisting mainly of nerve fibers with their myelin sheaths.

Answer 28

White matter