Chapter 8-3

Question 1

This is essential for maintaining posture

Answer 1

Tone

Question 2

The third phase (period) of a muscle twitch contraction

Answer 2

Relaxation

Question 3

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

Answer 3

Mitochondria

Question 4

State of limpness in which muscle tone is lost

Answer 4

Flaccid

Question 5

The cytoplasm of a muscle fiber

Answer 5

Sarcoplasm

Question 6

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

Answer 6

Muscle tissue

Question 7

Skeletal muscles have what?

Answer 7

Good blood supply and good nerve supply

Question 8

All the muscle fibers must contract or relax together in what

Answer 8

Motor unit

Question 9

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

Answer 9

Na + ions

Question 10

These ions are necessary to trigger muscle contraction

Answer 10

Ca 2 + ions

Question 11

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

Answer 11

Creatine

Question 12

The storage form of glucose in our liver and muscles

Answer 12

Glycogen

Question 13

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

Answer 13

Glycolysis

Question 14

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

Answer 14

No

Question 15

Connective tissue that attaches muscle to bone

Answer 15

Tendon

Question 16

The source of energy for muscle contraction

Answer 16

ATP

Question 17

Another name for an action potential

Answer 17

Impulse

Question 18

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

Answer 18

Oxygen

Question 19

Another name for muscle cells

Answer 19

Fibers

Question 20

The cell membrane of muscle cells

Answer 20

Sarcolemma

Question 21

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

Answer 21

Striations

Question 22

A single nerve fiber and the muscle fiber it supplies

Answer 22

Motor unit

Question 23

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

Answer 23

Ach

Question 24

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

Answer 24

Latent period

Question 25

Two types of skeletal muscle contractions needed for normal body movements

Answer 25

Isotonic/Tetanus

Question 26

The connection between a nerve fiber and a muscle fiber

Answer 26

NMJ

Question 27

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

Answer 27

Twitch

Question 28

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

Answer 28

SR

Question 29

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

Answer 29

Rigor mortis

Question 30

Name the major functions of muscles

Answer 30

Move. stabilize , organ vol. movement sub. Heat

Question 31

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

Answer 31

ACH

Question 32

The thick myofilament that has enlarged heads to form cross bridges

Answer 32

Myosin