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U3 Exam Review Lectures 3 and 4

Total questions: 67

Worksheet time: 50mins

Name
Class
Date
1.

Reorder the following steps (1-5) of a muscle contraction

a)

Nerve Impulse reaches Neuromuscular Junction

b)

Acetylcholine (ACH) Released by Motor Neuron

c)

ACH binds to Muscle Receptor Sites

d)

Action Potential charge travels down muscle cell

e)

Impulses reaches the SR and Ca+ channels open

1)
2)
3)
4)
5)
2.

Reorder the following (6-10) of the muscle contraction

a)

Ca+ ions diffuse from the SR and bind to troponin molecules

b)

Tropomyosin molecules move and expose specific sites on actin where myosin heads can bind

c)

Cross-bridges form, linking actin and myosin

d)

Actin filaments are pulled toward the center of the sarcomere by pulling of the cross-bridges, increasing the overlap of the thin and thick filaments

e)

The muscle fiber shortens as contractions occurs

1)
2)
3)
4)
5)
3.

The part of the sarcomere that C (Blue) refers to is the...

a)

Actin

b)

Myosin

c)

Troponin

d)

Tropomyosin

4.
The part of the sarcomere that D (Red) refers to is the?
a)

Actin

b)

Myosin

c)

Troponin

d)

Tropomyosin

5.
What state is the sarcomere in #1
a)

Relaxed

b)

Contracting

c)

Fully Contracted

d)

None of the above

6.

What state is the sarcomere in #2

a)

Relaxed

b)

Partially Contracted

c)

Fully Contracted

d)

None of the above

7.
What state is the sarcomere in #3
a)

Relaxed

b)

Contracting

c)

Fully Contracted

d)

None of the above

8.
What happens to the Z lines during a sarcomere contraction?
a)

It disappears

b)

gets closer together

c)

It gets bigger

d)

None of these

9.
The functional unit of the muscle cell is the: 
a)

Sarcomere

b)

Osteon

c)

Myofilament

d)

Muscle fiber

10.
Thin filaments in a myofibril are
a)

Sarcomeres

b)

Sarcoplasm

c)

Actin

d)

Myosin

11.
Thick filaments are in a myofibril are
a)

ATPase

b)

Sarcoplasmic reticulum

c)

Actin

d)

Myosin

12.

How may sarcomeres are shown above?

a)

6

b)

5

c)

4

d)

3

13.
Which is more true to cause muscle contraction?
a)
Actin Pulls on the myosin
b)
Myosin Pulls on the Titin
c)
Myosin Pulls on Actin
d)
Actin Pulls on Titin
14.
Which ion, when present, changes the conformation of tropomyosin?
a)
Calcium
b)
Sodium
c)
Potassium
d)
Lithium
15.
In order for tropomyosin to change conformation, calcium has to bind with...
a)
Voltage Gated Ion Channel
b)
Ligand Gated Ion Channel
c)
Troponin Protein
d)
Actin Protein
16.
What opens the Calcium Ion Transport Channel embedded in the pre-synaptic terminal?
a)
Binding of Acetylcholine
b)
Binding of Calcium Ion
c)
An Action Potential
d)
Binding of Sodium Ion
17.
Calcium that will eventually enter the muscle cell to bind with troponin is stored in the...
a)
T-Tubule of the Muscle Cell
b)
Sarcoplasmic Reticulum of the Muscle Cell
c)
The Sarcolemma of the Muscle Cell
d)
The interstitial space outside the muscle cell near the pre-synaptic terminal.
18.
Which of the following occurs first in muscle contraction?
a)
Calcium Ion Enters the Pre-synaptic Terminal
b)
Acetylcholine Enters the Synaptic Cleft
c)
Sodium Ion Enters the Sarcolemma
d)
Calcium Ion Enters the Sarcoplasm (Cytoplasm).
19.
Which of the following occurs first in muscle contraction?
a)
Myosin /Actin Cross bridge shifts to move actin.
b)
Phosphate is released form the myosin globular head
c)
Calcium Enters the Sarcoplasm (Cytoplasm) of the muscle cell.
d)
ADP is released form the myosin globular head.
20.
Which of the following occurs first in muscle contraction?
a)
Myosin globular head 'uncoils' releasing stored energy.
b)
Cross Bridges are formed between actin and myosin
c)
Tropomyosin changes shape (conformation) to expose myosin binding sites.
d)
Calcium Binds with Troponin
21.
a neurotransmitter that stimulates skeletal muscles
a)
acetylcholine (Ach)
b)
ATP
c)
cross bridges
d)
neuromuscular junction
22.
the only energy source that can be used to directly power muscle activity
a)
acetylcholine (Ach)
b)
ATP
c)
cross bridges
d)
neuromuscular junction
23.
the heads of the myosin myofilaments are called __ when they link the thick and the thin filament together 
a)
acetylcholine (Ach)
b)
ATP
c)
cross bridges
d)
neuromuscular junction
24.
point where an axon terminals of a nerve cell and the sarcolemma of a skeletal muscle join
a)
acetylcholine (Ach)
b)
ATP
c)
cross bridges
d)
neuromuscular junction
25.

Put steps of contraction in order.

a)

rest, nerve action, ACh released, transmitted, Ca released

b)

ACh released, Ca released, nerve action, transmitted, rest

c)

rest, nerve action, Ca released, ACh released, transmitted

d)

ACh released, Ca released, transmitted, nerve action, rest

26.

When the action reaches the muscle cell, it travels down the....

a)

Sarcolemma

b)

T Tubules

c)

Sarcoplasmic Reticulum

d)

Calcium Channel

27.

After calcium is released from the SR, it binds to _________

a)

troponin

b)

tropomyosin

c)

actin

d)

myosin

28.

Troponin moves the ____________ uncovering binding sites.

a)

actin

b)

troponin

c)

tropomyosin

d)

myosin

29.

A calcium deficiency would

a)

create uncoordinated muscle contractions

b)

allow muscle contraction, but not relaxation

c)

prevent contraction by preventing myosin from binding to actin

d)

have no effect on contraction

30.

Another name for the prime mover is

a)

antagonist

b)

agonist

c)

synergist

d)

fixator

31.

A muscle that helps the agonist is called a

a)

antagonist

b)

agonist

c)

synergist

d)

fixator

32.

What is the opposing muscle group for the quadriceps?

a)

biceps

b)

lower back

c)

hamstrings

d)

obliques

33.

In knee flexion, which is the agonist? (the one contracting or getting shorter)

a)

hamstrings

b)

quadriceps

34.

What is the agonist and what is the antagonist in a bicep curl?

a)

biceps are the agonist, triceps are the antagonist

b)

triceps are the agonist, biceps are the antagonist

35.

A muscle can be a agonist for one movement and an antagonist for a different movement

a)

true

b)

false

36.

The agonist and antagonist work in __________ to create movement

a)

tandem

b)

random

c)

opposition

d)

synchronization

37.

Identify the quadriceps

a)

5

b)

8

c)

6

d)

13

38.

Identify the hamstrings

a)

5

b)

8

c)

6

d)

13

39.

Identify the tibialis anterior

a)

5

b)

8

c)

6

d)

13

40.

Identify the gastrocnemius

a)

5

b)

8

c)

6

d)

13

41.

Identify the sternocleidomastoid

a)

1

b)

9

c)

7

d)

10

42.

Identify the trapezius

a)

1

b)

9

c)

7

d)

10

43.

Identify the deltoid

a)

3

b)

2

c)

11

d)

8

44.

Identify the pectorals

a)

3

b)

4

c)

7

d)

12

45.

Identify the biceps

a)

3

b)

4

c)

11

d)

12

46.

Identify the triceps

a)

3

b)

4

c)

11

d)

12

47.

Identify the abdominals

a)

3

b)

4

c)

11

d)

12

48.

Identify the latissimus dorsi

a)

3

b)

4

c)

11

d)

12

49.

This muscle group rotates the head and flexes the neck

a)

Trapezius

b)

Pectorals

c)

Sternocleidomastoid

d)

Latissimus dorsi

50.

This muscle group elevates, depresses, and retracts the scapula

a)

Trapezius

b)

Pectorals

c)

Sternocleidomastoid

d)

Latissimus dorsi

51.

This muscle group abducts the arms

a)

deltoid

b)

biceps

c)

triceps

d)

pectorals

52.

This muscle group flexes the shoulder (arms forward)

a)

deltoid

b)

biceps

c)

triceps

d)

pectorals

53.

This muscle group flexes the elbow

a)

deltoid

b)

biceps

c)

triceps

d)

pectorals

54.

This muscle group extends the elbow

a)

deltoid

b)

biceps

c)

triceps

d)

pectorals

55.

This muscle group bends the torso in a forward direction (think crunches), balance

a)

abdominals

b)

latissimus dorsi

c)

trapezius

d)

sternocleidomastoid

56.

This muscle group adducts the arms

a)

abdominals

b)

latissimus dorsi

c)

trapezius

d)

sternocleidomastoid

57.

This muscle group flexes the hip (legs forward)

a)

quadriceps

b)

hamstrings

c)

tibialis anterior

d)

gastrocnemius

58.

This muscle group extends the hip (legs back)

a)

quadriceps

b)

hamstrings

c)

tibialis anterior

d)

gastrocnemius

59.

This muscle group moves in a dorsiflexion motion

a)

quadriceps

b)

hamstrings

c)

tibialis anterior

d)

gastrocnemius

60.

This muscle group moves in a plantar flexion motion

a)

quadriceps

b)

hamstrings

c)

tibialis anterior

d)

gastrocnemius

61.
The type of muscle contraction where the muscle tenses but does not shorten.  
a)
Isometric
b)
Isotonic
c)
Contraction
d)
relaxation
62.
When a muscle shortens under tension, it is called_______
a)
isotonic eccentric contraction
b)
isotonic concentric contraction
c)
isometric concentric contraction
d)
isometric eccentric contraction
63.
As the athlete lowers the weights, his biceps undergo-
a)
isometric concentric contraction
b)
isotonic eccentric contraction
c)
isometric contraction
64.

What type of contraction is happening here??

a)

isostabilize

b)

isokinetic

c)

isotonic

d)

isometric

65.
During the downward phase of this squat, what muscles are undergoing isometric contractions?
a)
quadriceps
b)
hamstrings
c)
abdominals
d)
calves
66.

What is the correlation between muscle fatigue and oxygen debt?

a)

When O2 decreases, muscle fatigue increases

b)

When O2 increases, muscle fatigue decreases

c)

When O2 is obtained, muscle fatigue decreases

d)

The lesser the oxygen debt, the lesser the muscle fatige

67.

What is the correlation between lactic acid, ATP, and muscle contractions?

a)

increase in lactic acid, decrease ATP, decrease in muscle contraction

b)

increase in lactic acid, decrease ATP, increase in muscle contraction

c)

increase in lactic acid, increase in ATP, decrease in muscle contraction

d)

increase in lactic acid, increase in ATP, increase in muscle contraction

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