Question 1

Myofibrils are composed of ....

Accepted Answer

Actin and Myosin

Answer

Fasicles

Answer

Actin and ATP

Answer

Osteocyte and Myocyte

Question 2

Rigor mortis that occurs after death is due to

Accepted Answer

lack of ATP

Answer

to much actin

Answer

lack of actin

Answer

to much ATP

Question 3

This is an increase in the umber of motor units.

Accepted Answer

recruitment

Answer

synergist

Answer

threshold stimulus

Answer

activation energy

Question 4

Which of the following does not occur when a muscle undergoes atrophy?

Accepted Answer

gain of fast twitch muscle

Answer

decrease in size of filaments

Answer

decrease in mitochondria

Answer

decrease in capillaries

Question 5

A muscle cramp is due to the lack of

Accepted Answer

ATP

Answer

ADP

Answer

K ions

Answer

Na ions

Question 6

A partial but sustained contraction

Accepted Answer

muscle tone

Answer

twitch

Answer

cramp

Answer

atrophy

Question 7

Where are vesicles with neurotransmitters stored?

Accepted Answer

motor neuron endings

Answer

motor end plate

Answer

mitochondria

Answer

axon

Question 8

A muscle impulse travels across the sarcolemma  and into the muscle fiber (cell) by means of

Accepted Answer

transverse tubules (t tubules)

Answer

endoplasmic reticulum

Answer

mitochondria

Answer

motor end plate

Question 9

Activities such as swimming and running would stimulate the development of what kind of fibers?

Accepted Answer

slow twitch

Answer

quickly fatigued

Answer

fast twitch

Question 10

The amount of oxygen needed to convert lactic acid to glucose is

Accepted Answer

oxygen debt

Answer

acidosis

Answer

anaerobic respiration

Answer

aerobic respiration

Question 11

Smooth muscle contracts ________________ compared to skeletal muscle?

Accepted Answer

slower

Answer

faster

Answer

voluntarily

Question 12

Multiunit smooth muscle is not which of the following

Accepted Answer

found in sheets

Answer

found in blood vessels

Answer

involuntary

Answer

has no rhythmicity

Question 13

What is a sarcomere?

Accepted Answer

a functional unit of a muscle

Answer

a muscle cell

Answer

from Z line to M line

Answer

a type of muscle

Question 14

Actin has binding sites for....

Accepted Answer

myosin

Answer

ATP

Answer

Na

Answer

Ca

Question 15

An all or none response means

Accepted Answer

a muscle fiber can only contract fully or not at all

Answer

All muscle fibers contract none of the time

Answer

a muscle fiber can contract partially if needed

Question 16

Which of these does a motor unit not include

Accepted Answer

a synergist

Answer

a motor neuron

Answer

many muscle fibers

Question 17

Which enzyme causes acetylcholine to decompose?

Accepted Answer

cholinesterase

Answer

lactase

Answer

amylase

Answer

decompase

Question 18

What causes muscle fatigue?

Accepted Answer

build up of lactic acid

Answer

build up of glycogen

Answer

build up of ascorbic acid

Answer

build up of lactase

Question 19

Synergist is a muscle that

Accepted Answer

assists a prime mover

Answer

carries out the main action

Answer

does that opposite action of a prime mover

Question 20

An antagonist is a muscle that

Accepted Answer

does the opposite action of a prime mover

Answer

carries out the main action

Answer

assists a prime mover

Question 21

The minimal stimulus need to start a contraction

Accepted Answer

threshold stimulus

Answer

action stimulus

Answer

all or none stimulus

Question 22

The organs of the muscular system are

Accepted Answer

muscles

Answer

sarcomeres

Answer

muscle fibers

Answer

bones

Question 23

When do muscles release heat?

Accepted Answer

When they contract

Answer

When they relax

Answer

When they use aerobic respiration

Answer

When they use anaerobic respiration

Question 24

Which muscle is not striated and involuntary

Accepted Answer

smooth

Answer

cardiac

Answer

skeletal

Question 25

Which muscle is striated and voluntary

Accepted Answer

skeletal

Answer

cardiac

Answer

smooth

Question 26

Which muscle is striated, has rhythmicity, and is connected

Accepted Answer

cardiac

Answer

smooth

Answer

skeletal

Question 27

What is number 5

Accepted Answer

z line

Answer

m line

Answer

I band

Answer

H zone

Question 28

What is number 6

Accepted Answer

A band

Answer

I band

Answer

Z line

Answer

M line

Question 29

What is number 7

Accepted Answer

I band

Answer

A band

Answer

M line

Answer

H zone

Question 30

What is number 4

Accepted Answer

Myosin

Answer

Actin

Answer

Z line

Answer

M line

Question 31

What is number 3

Accepted Answer

actin

Answer

A band

Answer

I band

Answer

myosin

Question 32

What is number 1

Accepted Answer

sarcomere

Answer

I band

Answer

H zone

Answer

A band

Question 33

What is number2

Accepted Answer

H zone

Answer

A band

Answer

I band

Answer

M line

Question 34

What is number 8

Accepted Answer

M line

Answer

H zone

Answer

Sarcomere

Answer

I band

Question 35

neurotransmitter

Accepted Answer

chemical that is secreted by neurons to stimulate a muscle fiber to contract

Answer

the movable attachement of a muscle

Answer

contractile organelles within muscle cells

Answer

a muscle that assists the action of a prime mover

Question 36

KNOW THE STEPS OF A MUSCLE CONTRACTION

Accepted Answer

KNOW MUSCLE CONTRACTION STEPS

Answer

MUSCLE CONTRACTION STEPS KNOW

Answer

STEPS OF MUSCLE CONTRACTION KNOW

Question 37

prime mover

Accepted Answer

muscle responsible for a particular body movement

Answer

muscle that assists the action of a prime mover

Answer

muscle that acts in opposition to prime mover

Question 38

threshold stimulus

Accepted Answer

the weakest stimulus that must be exceeded to elicit a nerve impulse or a muscle contraction

Answer

contractile organelles within muscle cells

Answer

the amount of oxygen required to convert lactic acid to glucose

Question 39

synergist

Accepted Answer

muscle that assists the action of a prime mover

Answer

muscle responsible for a particular body movement

Answer

muscle that acts in opposition to the prime mover

Question 40

fascia

Accepted Answer

Layers of fibrous tissue covering and separating muscles.

Answer

Attachement of a muscle that remains relatively fixed during contracions.

Answer

Fiborous or membraneous sheet connecting a muscle and the part it moves

Question 41

myofibril

Accepted Answer

Contractile organelles within muscle cells

Answer

Contractile organelles within muscle cells.

Answer

A protein that contracts muscle fibers; is thinner

Question 42

recruitment

Accepted Answer

Increase in number of motor units activated as stimulation intensity increases.

Answer

Muscle responsible for a particular body movement.

Answer

The amount of oxygen required to convert lactic acid to glucose.

Question 43

aponeurosis

Accepted Answer

fibrous or membraneous sheet connecting a muscle and the part it moves

Answer

layers of fibrous tissue covering and separating muscles

Answer

attachement of a muscle that remains relatively fixed during contractions

Question 44

origin

Accepted Answer

attachment of a muscle that remains relatively fixed during contractions

Answer

the movable attachment of a muscle

Answer

muscle responsible for a particular body movement

Question 45

antagonist

Accepted Answer

muscle that acts in opposition to the prime mover

Answer

muscle that assists the action of a prime mover

Answer

muscle responsible for a particular body movement

Question 46

oxygen deficient

Accepted Answer

the amount of oxygen required to convert lactic acid to glucose

Answer

chemical that is secreted by neurons to stimulate a muscle fiber to contract

Answer

protein that contracts muscle fibers

Question 47

actin

Accepted Answer

protein that contracts muscle fiber; is thinner

Answer

protein that contracts muscle fiber; is thicker

Answer

contractile unit of a myofibril

Question 48

insertion

Accepted Answer

movable attachment of a muscle

Answer

attachment of a muscle that remains relatively fixed during contractions

Answer

muscle that assists the action of the prime mover

Question 49

sarcomere

Accepted Answer

contractile unit of a myofibril

Answer

a protein that contracts muscle fibers

Answer

contractile organelle within muscle cells

Question 50

myosin

Accepted Answer

protein that contracts muscle fibers; is thicker

Answer

protein that contracts muscle fibers; is thinner

Answer

contractile unit of myofibril

Question 51

motor neuron

Accepted Answer

transmits impulse form the central nervous system to a muscle

Answer

chemical that is secreted by neurons to stimulate a muscle fiber to contract

Answer

increase in number of motor units activated as stimulation intensity increases

Question 52

motor unit

Accepted Answer

a motor neuron and its associated muscle cells

Answer

muscle that acts in opposition to the prime mover

Answer

movable attachment of a muscle

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