Chap 4 A&P Muscular System

Question 1

Two main types of muscles

Answer 1

Voluntary and involuntary

Question 2

Is skeletal muscle striated

Answer 2

Yes

Question 3

Primary functions of the muscular system

Answer 3

Support
movement
protection

Question 4

What is an antagonistic muscle

Answer 4

Move in opposite direction

Example
Bicep flexes tricep relaxes

Question 5

What is endomysium

Answer 5

Wraps individual muscle fibers

Question 6

What is paramesium

Answer 6

Wraps bundles of fibers together

Question 7

What is epimysium and fascia

Answer 7

Wrap the entire muscle

Question 8

What is the portion of muscle with muscle fibers

Answer 8

Gaster a.k.a. belly

Question 9

endomysium, paramecium, epimysium and fascia all extend beyond Gaster of muscle to form the tendon

T or F

Answer 9

True

Question 10

What delivers impulses to muscles to be able to have voluntarily control

Answer 10

Neuron

Question 11

Each Barbara has a set of 4 to 20 right like filaments what are they known as

Answer 11

Myofibrils

Question 12

What is cytoplasm in myofibrils referred to as

Answer 12

Sarcoplasm

Question 13

What is scattered throughout the sarcoplasm that provides ATP

Answer 13

Mitochondria

Question 14

What is a sarcomere

Answer 14

Smaller units of myofibrils

They are the functional units of skeletal muscle

Question 15

The repetition of sarcomeres gift characteristics of striated appearance

True

Answer 15

True

Question 16

What are the 2 myofilaments that a sarcomere is composed of that run parallel to each other

Answer 16

Myosin- thick

Actin - thin

Question 17

When muscle contracts each myosin filament comes in contact with each other

T or F

Answer 17

True

Question 18

Where do my oh send an acting filaments come together

Answer 18

Myosin heads

Question 19

What is myoglobin

Answer 19

Reddish molecule that stores oxygen

Question 20

What is cellular respiration

Answer 20

The process by which oxygen moves in and out of the cell

Question 21

Why is read muscle often called slow muscle or oxidative muscle

Answer 21

Because of the reserve of oxygen supply in myoglobin

Question 22

What is white muscle

Answer 22

A.k.a. fast muscle or glycolytic muscle because of the plentiful glycogen present

Question 23

white muscle have very little or no myoglobin

T or F

Answer 23

True

Question 24

In white muscle is ATP used up quickly because of little oxygen available for cellular respiration

Y or N

Answer 24

Yes

Question 25

white muscle becomes quickly fatigued and more lactic acid buildup Y or N

Answer 25

Yes

Question 26

How is muscle contraction triggered

Answer 26

When they receive a nerve impulse called action potential

Question 27

The nerve impulses conducted by neurons a.k.a. nerve cells T or F

Answer 27

T

Question 28

Motor neurons control skeletal muscle T or F

Answer 28

T

Question 29

What is a synapse

Answer 29

Small gap where there is functional connection communication between neurons and other cells through chemical reactions

Question 30

What is the Arch

Answer 30

Neurotransmitter or acetycholine

Question 31

What is the area where the muscle and the motor neuron connect known as

Answer 31

Neuromuscular junction

Question 32

What neurotransmitter is released in the synapse for muscle contraction

Answer 32

Acetycholine

Question 33

In all resting cells, what ion concentration is kept low by the process of active transport

Answer 33

Sodium

Question 34

Which ion produces electrical activity within the skeletal muscle fibers

Answer 34

Sodium

Question 35

Which compound breaks down acetycholine Thus stopping The communication at the neuromuscular junction

Answer 35

Acetycholinesterase

Question 36

The muscle is at rest with the end of influx of which ions

Answer 36

Sodium and calcium

Question 37

Do facial muscles attached to various bones of the head

Answer 37

Yes

Question 38

Do facial muscles attach to the six muscles which move that Eye

Answer 38

No

Question 39

What are the eyes stimulated by

Answer 39

The 7th cranial nerve

Question 40

The six muscles which are responsible for eye-movement are stimulated by what cranial nerve

Answer 40

3rd cranial nerve ( occumulator nerve)

Question 41

The muscle is responsible for pupil dilation is stimulated by which cranial nerve

Answer 41

2nd ( optic nerve)

Question 42

Why do we examine the eyes and face muscles

Answer 42

We evaluate for stroke and certain toxin exposures

Question 43

What nerve stimulates the diaphragm

Answer 43

Phrenic nerve

Question 44

What muscle is responsible for the majority of movement of the chest wall during breathing

Answer 44

The diaphragm

Question 45

Which muscles can you inject someone in

Answer 45

``` Deltoid Lateral quad ( vastus lateralis) ```

Question 46

2 primary electrolytes involved in muscle contraction

Answer 46

Sodium (Na) Potassium (K) calcium (Ca)

Question 47

What is diffusion

Answer 47

Movement of molecules in and out of cell