Chapter 3 - Muscle Structure And Function Flashcards Preview

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Flashcards in Chapter 3 - Muscle Structure And Function Deck (81)
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Human body consists of _____ muscles

640

1

Muscle makes up ___-___% (in women) and ___-___ (in men) of body mass

30-35 in women and 42-47 in men

2

What are the 3 basic types of muscle?

1) skeletal
2) smooth
3) cardiac

3

What is another name for skeletal muscle?

Striated muscle

4

Skeletal muscle connects the various parts of the skeleton through one or more connective tissue structures called _______

Tendons

5

During muscle _______ skeletal muscle shortens and moves various parts of the skeleton

Contraction

6

How can the required smoothness and speed of muscles be achieved?

Through the graded activation of muscles

7

Are skeletal muscles under voluntary or involuntary control?

Under voluntary control

8

________ involves the assessment of movement and the sequential pattern of muscle activation that that move body segments

Biomechanics

9

What is most skeletal muscle attached to?

Bone

10

What is skeletal muscles contraction responsible for?

Supporting and Moving the skeleton

11

List 4 spots u can find smooth muscle.

1) blood vessels
2) respiratory tract
3) iris of the eye
4) gastro-intestinal tract

12

Are the contractions of smooth muscle slow and uniform?

Yes

13

What are the functions of the smooth muscle?

To alter the activity of various body parts to meet the needs f the body at that time

14

Smooth muscle is fatigue _______

Resistant

15

Activation of smooth muscle is ________

Involuntary

16

Swallowing food in the esophagus uses wave like movements called _____

Peristalsis

17

What kind of muscle has characteristics of both skeletal and smooth

Cardiac muscle

18

What are the functions of cardiac muscle

To provide the contractile activity of the heart

19

Contractile activity can be ______ (like skeletal muscle)

Graded

20

Is very fatigue _______

Resistant

21

Activation of cardiac muscle is ________ (like smooth muscle)

Involuntary

22

What are the 4 components of skeletal muscle?

1) muscle belly
2) muscle fiber bundle
3) muscle fiber
4) filament proteins

23

What is the muscle belly? (Of skeletal muscle)

The "whole" of the muscle is the muscle belly

24

What is the muscle fiber bundle? (Of skeletal muscle)

Muscle fiber bundle is a bunch of fibers bundled together

25

What are muscle fibers? (Skeletal muscle)

Muscle fibers are the individual muscle fibers that make up the bundle

26

Where are filament proteins found in skeletal muscle?

Inside the myofibril

27

Muscle fibers are ______ shaped cells that make up the skeletal muscle

Cylinder

28

Each muscle fiber is made up of a nber of _________

Myofilaments

29

Muscle fibers are surrounded by a connective tissue sheath (membrane) called __________

Sarcolemma