Unit 4: Notes 1 Flashcards Preview

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Flashcards in Unit 4: Notes 1 Deck (21)
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1

name the functions of muscle

1. produce body movement
2. stabilize body position
3. regulate body volume
4. move substances internally (involuntary)
5. produce heat
6. help maintain homeostasis

2

what are the physiological properties?

1. elasticity
2. contractibility
3. excitability
4. extensibility

3

elasticity

ability to stretch and go back to normal shape

4

contractability

ability to shorten

5

excitability

ability to respond to stimuli

6

extensibility

ability to stretch without tearing

7

what are the common characteristics

1. all muscle fibers are elongated
2. have two types of muscle filaments for contraction (actin and myosin)

8

name the three types of muscle

skeletal, smooth, cardiac

9

what is the general info of skeletal muscle

1. 40%-50% of total body weight
2. controlled: consciously (voluntary)
3. aka voluntary muscle

10

where is skeletal muscle found

attached to the bones

11

. what does skeletal muscle look like

- thick
- long
- cylindrical
- unbranched
- striated
- multi-nucleated

12

what are the functions of skeletal muscle

1. moving the skeleton
2. maintaining posture
3. stabilizing joints
4. generates heat

13

is smooth muscle voluntary or involuntary

involuntary

14

where is smooth muscle found

found in the walls of hollow organs in the walls of blood vessels

15

what does the fibers of smooth muscle look like

- relatively small
- non-striated
- spindle shaped
- one nucleus/cell

16

function of smooth muscle

internal movement

17

is cardiac muscle voluntary or involuntary

involuntary

18

where is cardiac muscle found

in the walls of the heart

19

what do the fibers of cardiac muscle look like

- short
- branching
- cylindrical
- finely striated
- contain one nucleus per cell
- intercalated discs

20

what are intecalated discs

joints between cells

21

what is the function of cardiac muscle

pump blood