Johnson 1

Question 1

CNS is composed of…

Answer 1

Brain and Spinal Cord

Question 2

Convey information from receptors to the central nervous system

Answer 2

Afferent Fibers

Question 3

Convey information from the central nervous system to effectors (muscles and glands)

Answer 3

Efferent Fibers

Question 4

Efferent fibers go to…

Answer 4

• Somatic Nervous System

- Autonomic Nervous System

Question 5

Conveys information

from the CNS to Skeletal Muscles

Answer 5

Somatic Nervous System

Question 6

Conveys information from the CNS to smooth muscle, cardiac muscle, and glands.

Answer 6

Autonomic Nervous System

Question 7

Autonomic Nervous System consists of…

Answer 7

• Sympathetic

- Parasympathetic

Question 8

(Thoraco-lumbar) Nervous System

Answer 8

Sympathetic

Question 9

(Cranio-sacral) Nervous System

Answer 9

Parasympathetic

Question 10

There are ___ pairs of spinal nerves and ___ pairs of cranial nerves.

Answer 10

• 31

- 12

Question 11

The functional unit of the nervous system is the _____.

Answer 11

Neuron

Question 12

A _____ is the nerve cell body and all of its processes.

Answer 12

Neuron

Question 13

A ______ consists of an axon covered by a sheath (neurolemma). Axons may be myelinated or unmyelinated. In the peripheral nervous system, the sheaths are formed by Schwann cells.

Answer 13

Nerve fiber

Question 14

A _____ is a functional contact between neurons.

Answer 14

Synapse

Question 15

In a ______, a neurotransmitter is released from the axonal ending of one neuron into a cleft and acts on receptors on the membrane surface of the second neuron.

Answer 15

Synapse

Question 16

A collection of nerve cell bodies WITHIN the CNS

Answer 16

Nucleus

Question 17

A collection of nerve cell bodies OUTSIDE the CNS (i.e., in the PNS)

Answer 17

Ganglion

Question 18

A _____ is a bundle of nerve fibers held together by connective tissue and located outside the CNS. It may contain more than one type of nerve fiber, and a nerve fiber may lie in several different nerves throughout its course.

Answer 18

Nerve

Question 19

Can a nerve fiber travel in more than one nerve?

Answer 19

Yes

Question 20

There are only ____ basic types of nerve fibers in the peripheral nervous system.

Answer 20

four

Question 21

Name the four basic types of nerve fibers in the PNS.

Answer 21

Afferent: afferent
Efferent: efferent to skeletal muscle, preganglionic efferent (autonomic), postganglionic efferent (autonomic)

Question 22

Neurons of ANS innervate:

Answer 22

1. All smooth muscle
2. All cardiac muscle
3. All glands

Question 23

Primarily the domain of cranial nerves

Answer 23

Head

Question 24

Domain of spinal nerves; From skin externally to layer lining body wall internally (includes extremities)

Answer 24

Body wall

Question 25

a. Thorax b. Abdomen c. Pelvis

Answer 25

Viscera

Question 26

31 pairs of spinal nerves

Answer 26

``` Cervical: 8 pairs Thoracic: 12 pairs Lumbar: 5 pairs Sacral: 5 pairs Coccygeal: 1 pair ```

Question 27

Which fibers are necessary for the body wall and extremities?

Answer 27

- Afferent fiber - Efferent to skeletal muscle - Preganglionic and postganglionic efferent fibers

Question 28

For the body wall and extremities, where is the location of the afferent fibers?

Answer 28

Dorsal root ganglion

Question 29

For the body wall and extremities, where is the location of the efferent to skeletal muscle fibers?

Answer 29

Ventral gray horn

Question 30

For the body wall and extremities, where is the location of the preganglionic efferent fibers?

Answer 30

Intermediolateral cell column

Question 31

For the body wall and extremities, where is the location of the postganglionic efferent fibers?

Answer 31

Sympathetic trunk

Question 32

Nerve fiber types found in NERVES supplying a skeletal muscle

Answer 32

1. Efferent to skeletal muscle 2. Afferent 3. Postganglionic efferent

Question 33

Nerve fiber types found in NERVES supplying skin (cutaneous) or a joint (articular)

Answer 33

1. Afferent | 2. Postganglionic efferent

Question 34

A ______ is the area of skin supplied by afferent fibers in the dorsal root ganglion of a single spinal nerve

Answer 34

Dermatome

Question 35

In many regions of the body, major branches of adjacent ventral primary rami join in networks called ______. Note that dorsal primary rami always remain segmental.

Answer 35

plexuses