Chapter 8-3 Flashcards Preview

Anatomy Physiology > Chapter 8-3 > Flashcards

Flashcards in Chapter 8-3 Deck (32):
1

This is essential for maintaining posture

Tone

2

The third phase (period) of a muscle twitch contraction

Relaxation

3

These structures in the enlarged bulb of an axon provide energy to make ACh

Mitochondria

4

State of limpness in which muscle tone is lost

Flaccid

5

The cytoplasm of a muscle fiber

Sarcoplasm

6

This tissue is responsible for most of the heat production going in our body

Muscle tissue

7

Skeletal muscles have what?

Good blood supply and good nerve supply

8

All the muscle fibers must contract or relax together in what

Motor unit

9

The movement of these ions from outside the sarcolemma to inside causes an action potential to begin to move along

Na + ions

10

These ions are necessary to trigger muscle contraction

Ca 2 + ions

11

Dietary supplement that some studies show may result in more lifting power

Creatine

12

The storage form of glucose in our liver and muscles

Glycogen

13

The anaerobic process provides enough energy for 30-40 sec of maximal activity

Glycolysis

14

Does the length of actin and myosin filaments change during muscle contraction

No

15

Connective tissue that attaches muscle to bone

Tendon

16

The source of energy for muscle contraction

ATP

17

Another name for an action potential

Impulse

18

This is required by mitochondria in the aerobic production of energy for muscle contraction.

Oxygen

19

Another name for muscle cells

Fibers

20

The cell membrane of muscle cells

Sarcolemma

21

Alternate light and dark bands running through the sarcoplasm of a muscle cell

Striations

22

A single nerve fiber and the muscle fiber it supplies

Motor unit

23

A chemical necessary to transfer the nerve impulse to stimulate the muscle

Ach

24

The time between the application of a stimulus and the actual shortening of the muscle

Latent period

25

Two types of skeletal muscle contractions needed for normal body movements

Isotonic/Tetanus

26

The connection between a nerve fiber and a muscle fiber

NMJ

27

A brief contraction of all muscle fibers of a motor unit in response to a single stimulus

Twitch

28

Most of the Ca+2 is found here when a muscle fiber is relaxed

SR

29

A stiffening of the muscles after death due to Ca +2 leaking out of the sarcoplasmic reticulum

Rigor mortis

30

Name the major functions of muscles

Move. stabilize , organ vol. movement sub. Heat

31

The neurotransmitter released fro, the synaptic vesicles of neurons supplying skeletal muscle

ACH

32

The thick myofilament that has enlarged heads to form cross bridges

Myosin