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Muscle Physiology Overview

Total questions: 25

Worksheet time: 8mins

Name
Class
Date
1.

Which is not a function of Muscle tissue?

a)

movement

b)

stability

c)

heat production

d)

hematopoeisis

2.

Universal Property of Muscle that it can stretch to 3x length without rupturing.

a)

Excitability

b)

Conductivity

c)

Extensibility

d)

Elasticity

3.

Universal Property of Muscle that means responsiveness.

a)

Excitability

b)

Conductivity

c)

Extensibility

d)

Elasticity

4.

Universal Property of Muscle after stretching a cell it can return to its normal length.

a)

Excitability

b)

Conductivity

c)

Extensibility

d)

Elasticity

5.

Universal Property of Muscle that excitation can spread around the entire plasma membrane.

a)

Excitability

b)

Conductivity

c)

Extensibility

d)

Elasticity

6.

The epimysium covering on the outside of the muscle can blend into cordlike _________ or sheet-like ___________.

a)

ligaments, tendons

b)

tendons, ligaments

c)

fascia, ligaments

d)

tendons, fascia

7.

Contains myosatellite stem cells.

a)

endomysium

b)

perimysium

c)

epimysium

d)

fascia

8.

Bundles fascicle together.

a)

endomysium

b)

perimysium

c)

epimysium

d)

fascia

9.

Organelle that wraps and surrounds the myofibril and stores Calcium.

a)

sarcolemma

b)

sarcoplasm

c)

sarcoplasmic reticulum

d)

T Tubules

10.

Organelle that is plasma membrane of muscle fiber.

a)

sarcolemma

b)

sarcoplasm

c)

sarcoplasmic reticulum

d)

T Tubules

11.

Actin in myofibril

a)

sarcomere

b)

thin filament

c)

thick filament

d)

sarcolemma

12.

Myosin in myofibril

a)

sarcomere

b)

thin filament

c)

thick filament

d)

sarcolemma

13.

Repeating functional unit in myofibril

a)

sarcomere

b)

thin filament

c)

thick filament

d)

sarcolemma

14.

Average number of sarcomeres in myofibril

a)

10

b)

100

c)

1,000

d)

10,000

15.

Z line to Z line

a)

I band

b)

A band

c)

H band

d)

sarcomere

16.

light bands, actin only

a)

I band

b)

A band

c)

H band

d)

sarcomere

17.

dark band, both thin & thick myofilaments

a)

I band

b)

A band

c)

H band

d)

sarcomere

18.

thin myofilaments connected together by actinins

a)

I band

b)

A band

c)

H band

d)

Z line

19.

In the zone of overlap: ____ thick filaments surround each thin filament and ____thin filaments surround each thick filament.

a)

2, 4

b)

3, 6

c)

4, 2

d)

6, 3

20.

Neurotransmitter released at motor end plate.

a)

Dopamine

b)

Acetylcholine

c)

Epinephrine

d)

Histamine

21.

_____ & ATP trigger the contraction cycle of muscle fiber.

a)

Sodium

b)

Potassium

c)

Phosphorous

d)

Calcium

22.

During muscle fiber contraction: Z lines __________

a)

are unchanged

b)

move farther apart

c)

move closer together

d)

line up with each other

23.

During muscle fiber contraction: A bands __________

a)

are unchanged

b)

move farther apart

c)

move closer together

d)

line up with each other

24.

During muscle fiber contraction: H bands & I bands __________

a)

are unchanged

b)

widen

c)

narrow

d)

line up with each other

25.

Muscle fiber returns to normal length when _________.

a)

Sodium is reabsorbed

b)

Potassium is reabsorbed

c)

Calcium is reabsorbed

d)

Cloride is reabsorbed