unit 6

Question 1

List the parts of a muscle.

Answer 1

Muscle fiber
Endomysium
Fascicle
Perimysium
Epimysium
Fascia

Question 2

difference between isometric
contractions and isotonic contractions

Answer 2

isometric tendon change lengeth isotonic stays the same

Question 3

difference between the muscle
origin and insertion

Answer 3

Origin – the end that attaches to the more
stationary bone

Insertion – the end that attaches to the more
moveable bone

Question 4

prime mover

Answer 4

– the main muscle that triggers a
movement

Question 5

Synergist

Answer 5

– the muscle that assists the prime
mover

Question 6

Antagonists

Answer 6

oppose the action of the prime
mover to help with control of the movement

Question 7

Roles of the nervous system

Answer 7

Sensing
◦ Integrating
◦ Responding

Question 8

CNS

Answer 8

CNS consists of the brain and spinal cord and the name of the nervous system
division

Question 9

PNS

Answer 9

consists of the network of nerves throughout
the body is the name of the nervous system
division that includes the nerves that extend to
the outlying parts of the body

Question 10

Sensory

Answer 10

(afferent) division carries signals
from the nerve endings to the CNS

Question 11

Motor

Answer 11

division transmits information
from the CNS to the rest of the body

Question 12

Oligodendrocytes

Answer 12

form the myelin sheath
in the brain and spinal cord

Question 13

Oligodendrocytes

Answer 13

– form the myelin sheath
in the brain and spinal cord

Question 14

Ependymal cells –

Answer 14

line the spinal cord and
cavities of the brain

Question 15

Microglia

Answer 15

perform phagocytosis of microorganisms and cellular debris

Question 16

Astrocytes

Answer 16

– nourish neurons in the brain
tissue

Question 17

Schwann cells

Answer 17

– form the myelin sheath
around nerves in the PNS

Question 18

Satellite cells

Answer 18

– nourish the neurons (same
as astrocytes in CNS)

Question 19

Interneurons

Answer 19

connect incoming sensory pathways with outgoing
motor pathways

Question 20

Multipolar

Answer 20

One axon multiple dendrites
Brain and spinal cord

Question 21

Bipolar have

Answer 21

Axon and dendrite
 Retina eye
 Olfactory nerve (

Question 22

Unipolar have

Answer 22

Axon branch only

Question 23

Soma are

Answer 23

The cell body
◦ Control centre that contains the nucleus

Question 24

Dendrites

Answer 24

Receive signals from the other neurons and send
the information towards the soma

Question 25

Axon

Answer 25

Carry signals away from the soma

Question 26

Myelin sheath

Answer 26

Insulates the axon

Question 27

Nodes of Ranvier

Answer 27

Gaps in the myelin sheath that assist with conduction of impulses

Question 28

Synaptic knob are

Answer 28

Neurotransmitter-containing vesicles at the end of the axon branches

Question 29

Nerve Impulses

Answer 29

Wave of electrical disturbance that travels along the surface of a neuron membrane

Question 30

. Resting potential

Answer 30

Outside the cell = Na+; inside = K+ and negative ions

Question 31

Depolarization

Answer 31

Stimulus causes Na+ to enter cell

Question 32

Repolarization

Answer 32

K+ flows out of the cell; electrical balance is restored ◦ Na+ and K+ are now on the wrong side

Question 33

Refractory period ◦

Answer 33

Sodium-potassium pump works to return Na+ and K+ to the correct side

Question 34

Electrical synapse

Answer 34

the neurons touch which allows an action potential to pass directly from one neuron to the next

Question 35

Chemical synapse

Answer 35

the neurons do not touch so neurotransmitters are used to cross the synaptic cleft and carry the message

Question 36

Cauda equina

Answer 36

Bundle of nerve roots that protrude from the end of the spinal cord

Question 37

Cauda equina

Answer 37

Bundle of nerve roots that protrude from the end of the spinal cord

Question 38

Ascending tract

Answer 38

conveys sensory signals up the spinal cord

Question 39

Descending tracts

Answer 39

conveys impulses down the spinal cord to the skeletal muscles

Question 40

Gray matter vs white matter

Answer 40

Gray matter contains no myelin White matter contains myelin

Question 41

Meningeal layers

Answer 41

Pia mater – innermost layer that contains blood vessels

Question 42

Arachnoid mater

Answer 42

what is middle layer (very thin)

Question 43

what is Dura mater

Answer 43

the tough, outer layer

Question 44

Subarachnoid space

Answer 44

Between the pia mater and the arachnoid mater ◦ Contains cerebrospinal fluid

Question 45

The Spinal Cord

Answer 45

has 8 cervical 12 thoracic 5 lumbar 5 sacral 1 coccygeal Total: 31