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Intro to Muscle Physiology

Total questions: 25

Worksheet time: 14mins

Name
Class
Date
1.

The dense irregular connective tissue layer called the epimysium surrounding the entire muscle is at ____.

a)

A

b)

B

c)

C

d)

D

e)

E

2.

The muscle "fiber" or cell is at ____ and is surrounded by a connective tissue layer called _____.

a)

A; epimysium

b)

B; perimysium

c)

C; epimysium

d)

D; perimysium

e)

E; endomysium

3.

The lining at A surrounding this muscle "fiber" or cell is termed _____.

a)

nucleus

b)

sarcolemma

c)

endomysium

d)

myofibril

4.

The name for the cell membrane of a muscle fiber is

a)

sarcolemma

b)

sarcoplasm

c)

sarcomere

d)

sarcoplasmic reticulum

5.

The name for the cytoplasm of a muscle fiber is

a)

sarcolemma

b)

sarcomere

c)

sarcoplasm

d)

sarcoplasmic reticulum

6.

The name for the smooth ER of a muscle fiber is

a)

sarcomere

b)

sarcoplasm

c)

sarcoplasmic reticulum

d)

sarcolemma

7.

The thousands of densely packed, rodlike elements that make up a muscle fiber

a)

myofibrils

b)

nuclei

c)

sarcomeres

d)

actins and myosins

8.

The striations seen in a muscle fiber are stripes formed from repeating series of dark and light bands along the length of each myofibril. The "dark" bands can be seen at _____.

a)

A

b)

B

c)

C

d)

D

e)

E

9.

As discussed in class, a sarcomere is the fundamental unit of muscle contraction, extending from one ______ to another.

a)

A band

b)

I band

c)

M line

d)

H zone

e)

Z disc

10.

The thin myofilament that extends across I band and partway in A band

a)

actin

b)

myosin

11.

The thick myofilament that extends length of the A band

a)

actin

b)

myosin

12.

A sarcomere is the distance between two ________.

a)

A band

b)

Z discs

c)

I band

d)

Myosin

13.

The ________ contains only the actin filaments.

a)

A band

b)

Z discs

c)

I band

d)

Myosin

14.

The thicker filaments are the ________ filaments.

a)

actin

b)

myosin

15.

Both actin and myosin are found in the ________.

a)

A band

b)

Z discs

c)

I band

d)

Myosin

16.

The myosin filaments are located in the ________.

a)

A band

b)

Z discs

c)

I band

d)

Myosin

17.

Which of the following surrounds the individual muscle cell?

a)

perimysium

b)

endomysium

c)

epimysium

d)

fascicle

18.

What is the functional unit of a skeletal muscle called?

a)

a sarcomere

b)

a myofilament

c)

a myofibril

d)

the sarcoplasmic reticulum

19.

Muscle tissue has all of the following properties except ________.

a)

secretion

b)

contractility

c)

extensibility

d)

excitability

20.

Which of the following statements is true?

a)

Cardiac muscle cells have many nuclei.

b)

Smooth muscle cells have T tubules.

c)

Striated muscle cells are long and cylindrical with many nuclei.

d)

Cardiac muscle cells are found in the heart and large blood vessels.

21.

What is the most distinguishing characteristic of muscle tissue?

a)

it is composed of multiple cells working together

b)

the ability to respond to nervous stimulation

c)

its cells' in ability to reproduce by mitosis

d)

he ability to transform chemical energy into mechanical energy to move the body

22.

Which type of muscle is multinucleated?

(a)  

23.

The end of the muscle that is attached to the part of the body in motion when a muscle contracts is called the 

a)

origin

b)

insertion

24.

Functions of muscle

a)

Produce Movement

b)

Maintain Posture

c)

Stabilize Joints

d)

Generate Heat

e)

Reduce friction

25.

Characteristics of Muscle

a)

Excitability

b)

Contractility

c)

Extensibility

d)

Elasticity

e)

involuntary