Nervous system

Question 1

2 parts of the nervous system are….

Answer 1

CNS, PNS

Question 2

The central nervous system consists of…

Answer 2

brain, spinal cord

Question 3

The peripheral nervous system consists of…

Answer 3

cranial and spinal nerves that extend beyond the CNS

Question 4

The PNS is divided into….

Answer 4

the autonomic nervous system, and the sensory-somatic nervous system

Question 5

The autonomic nervous system controls ________ body functions.

Answer 5

automatic (heartbeat, digestion)

Question 6

The autonomic system includes what two types of nerves?

Answer 6

sympathetic nerves, parasympathetic nerves

Question 7

What nerves are active when a person is excited or scared

Answer 7

sympathetic nerves

Question 8

What nerves are active when a person is at rest

Answer 8

parasympathetic nerves

Question 9

The sensory-somatic nervous system consists of…

Answer 9

12 pairs of cranial nerves and 31 pairs of spinal nerves and associated ganglia

Question 10

What are ganglia?

Answer 10

collections of nerve cell bodies

Question 11

The sensory-somatic nervous system controls what?

Answer 11

voluntary actions (talking and walking)

Question 12

Nerve cells are called..

Answer 12

neurons

Question 13

The functional units of the nervous system

Answer 13

neurons

Question 14

The main parts of he neuron are…

Answer 14

cell body, axon, dendrites

Question 15

What do dendrites do?

Answer 15

transmit the impulse toward the cell body

Question 16

What do axons do?

Answer 16

transmit the impulse away from the cell body and connects one neuron with another neuron over a synapse

Question 17

What is a synapse?

Answer 17

A fluid filled gap axons of neurons connect with each other over

Question 18

The transmission of impulses to another neuron happens how fast?

Answer 18

About 90 meters per second

Question 19

3 main functions of the nervous system

Answer 19

to provide sensory, motor, and integrative functions within the body.

Question 20

The sensory function includes…

Answer 20

feeling pain, heat, and other stimuli

Question 21

The motor function serves to..

Answer 21

carry electrical impulses from the CNS to the effectors

Question 22

Effectors are most commonly …..

Answer 22

glands and muscles

Question 23

The integrative function..

Answer 23

uses sensory information to make decisions by joining together sensory input with memories already stored in the brain.

Question 24

Sensory neurons aka _______ transmit nerve impulses ________.

Answer 24

afferent, toward the CNS

Question 25

Motor neurons aka _________ transmit nerve impulses _________.

Answer 25

efferent, away from the CNS

Question 26

The cerebrum is associated with…

Answer 26

movement and sensory input

Question 27

The cerebellum is responsible for…

Answer 27

muscular coordination

Question 28

The medulla oblongata controls…

Answer 28

many vital functions such as respiration and heart rate

Question 29

The spinal cord is how long?

Answer 29

Approximately 18 in

Question 30

The spinal cord extends from where to where?

Answer 30

The base of the scull (foramen magnum) to the first or second lumbar vertebra (L1 or L2)

Question 31

How many pairs of spinal nerves exit the spinal cord?

Answer 31

31 pairs

Question 32

What are simple (spinal) relexes?

Answer 32

Those in which nerve impulses travel through the spinal cord only and DO NOT reach the brain

Question 33

Sensory impulses enter the ______________.

Answer 33

dorsal horns of the spinal cord

Question 34

Motor impulses leave through the _________.

Answer 34

ventral horns of the spinal cord