Ch 8 Study Guide

Question 1

actions of the sympathetic nervous system

Answer 1

• increase blood pressure
• stimulate adrenal glands
• dilate pupils

Question 2

what does the brachial plexus do

Answer 2

the brachial plexus supplies motor impulses to the shoulder

Question 3

what kind of reflexes is a knee jerk reflex

Answer 3

• simple reflex
• spinal reflex
• stretch reflex

Question 4

the correct order of a impulse conducting through a reflex arc

Answer 4

receptors –> sensory neuron –> spinal cord –> motor neuron –> effector

Question 5

where do motor impulses travel through

Answer 5

motor impulses travel through the spinal cord in the descending tract

Question 6

what does the central canal of the spinal cord contain

Answer 6

the central canal of the spinal cord contains Cerebrospinal Fluid (CSF)

Question 7

what part of the nervous system that consists of all the spinal nerves and cranial nerves

Answer 7

Peripheral Nervous System

Question 8

what is the division of the nervous system that exclusively contains the skeletal muscle

Answer 8

somatic nervous system

Question 9

how many pairs of cervical spinal nerves

Answer 9

8

Question 10

how many pairs of spinal nerves

Answer 10

31

Question 11

where do sensory impulses enter in the spinal cord

Answer 11

dorsal horn of spinal cord

Question 12

what kind of nervous tissue is grey matter

Answer 12

nerve cell bodies and dendrites

Question 13

what kind of nervous tissue is white matter

Answer 13

myelinated nerve fibers (axons)

Question 14

what is a neurotransmitter

Answer 14

a chemical messenger; crosses the synapse

Question 15

what is a point of junction between 2 nerve cells

Answer 15

synapse

Question 16

which nerve impulses conduct faster in axons

Answer 16

nerve impulses that are coated with myelin

Question 17

which ions enter the neuron through channels during depolarization phase of the action potential

Answer 17

sodium ions

Question 18

what is a dendrite

Answer 18

a branched extension of a neuron that receives signals from other neurons and transmits those signals to the body

Question 19

what is the scientific name for a nerve cell

Answer 19

neurons

Question 20

where do the impulses travel from a dendrite

Answer 20

travel toward the cell body

Question 21

what are the components of the voluntary or somatic nervous system

Answer 21

afferent (sensory) nerves and efferent (motor) nerves

Question 22

what are the components of the parasympathetic nervous system

Answer 22

cranial and spinal nerves

Question 23

what are the components of the sympathetic nervous system

Answer 23

• preganglionic neurons
• sympathetic ganglia
• postganglionic neurons

Question 24

what are the components of the central nervous system

Answer 24

brain and spinal cord

Question 25

cervical plexus

Answer 25

neck
- phrenic nerve arises from cervical plexus

Question 26

brachial plexus

Answer 26

shoulder arm

Question 27

lumbosacral

Answer 27

pelvis and sacral

Question 28

sympathetic

Answer 28

fight or flight