EXAM 2

Question 1

The nervous system controls and coordinates?

Answer 1

all the functions of the body

Question 2

CNS Encloses the

Answer 2

brain and spinal cord

Question 3

PNS Encloses the

Answer 3

Spinal nerves

Question 4

ANS Encloses the

Answer 4

Autonomic nervous system

Question 5

what is the basic fundamental unit of the nervous system?

Answer 5

the neuron

Question 6

what are the components of the neuron? 4

Answer 6

Dendrites
cell body
Axon
Axon Hillock

Question 7

Dendrites are

Answer 7

Sensory Afferent

Question 8

The cell body contains

Answer 8

genetic information

Question 9

what is the elongated portion if the neuron that is located between the soma and synaptic cleft

Answer 9

Axon

Question 10

what neuron connects and communicates with each other?

Answer 10

synapse

Question 11

a gap between the axon of one neuron and the dendrites of another is a

Answer 11

synaptic cleft

Question 12

a chemical messenger that helps cells communicate with each other

Answer 12

neurotransmitters

Question 13

what are 4 neurotransmitters

Answer 13

serotonin
dopamine
glutamate
acetylcholine

Question 14

acetylcholine is secreted by

Answer 14

all parasympathetic and pre-ganglionic neurons

Question 15

serotonin is called the “happy’ chemical because iT contributes to

Answer 15

the well-bell being and happiness

Question 16

____ is secreted by nearly all sympathetic postganglionic fibers

Answer 16

Norepinephrine

Question 17

the neurotransmitter that is secreted by ALL parasympathetic preganglionic neurons is

Answer 17

acetylcholine

Question 18

cells that support and protect the nervus system

Answer 18

neuroglia

Question 19

what is the most common cell type in central nervous system

Answer 19

neuroglia

Question 20

Large star shaped cells that hold nerve cells in place and help them developed and work properly

Answer 20

astrocytes

Question 21

______ are the glial cells that form the myelin sheath on axons

Answer 21

schwann cells

Question 22

schwann cells are the glial cells that form the myelin sheath on axons this process is called?

Answer 22

myelination

Question 23

myelination is made of

Answer 23

fatty lipids and proteins

Question 24

when a neuron sends information down an axon away from the cell body this process is called

Answer 24

action potential

Question 25

The spinal cord carries nerve signals from your ____ to ___

Answer 25

brain to your body and vice versa

Question 26

These nerve signals help you feel __ and ____

Answer 26

sensations and move your body

Question 27

Functions of the spinal cord 4

Question 28

The posterior (dorsal) horns of the spinal cord contain _____ responding to afferent sensory stimulation

Answer 28

neurons

Question 29

ascending tracts carry sensory signals up the spinal cord

Answer 29

sensory afferent

Question 30

descending tracts carry motor signals from the brain to the spinal cord

Answer 30

motor efferent