Chapter 8 Part 1 Test

Question 0

Shortens the muscles and causes movement

Answer 0

Isotomic

Question 1

Slight, constant contraction during consciousness

Answer 1

Tone

Question 2

Increases muscle tension but no movement occurs

Answer 2

Isometric

Question 3

Continuous sustained contraction allowing smooth movement

Answer 3

Tetanus

Question 4

“Stairstep” increase in contraction with repeated stimulation before muscle has completely relaxed

Answer 4

Summation

Question 5

Multinucleated

Answer 5

Skeletal

Question 6

Found in blood vessels and stomach

Answer 6

Smooth

Question 7

Voluntary

Answer 7

Skeletal

Question 8

Branched with intercalated discs

Answer 8

Cardiac

Question 9

Spindle-shaped

Answer 9

Smooth

Question 10

Cylindrical in shape; unbranched

Answer 10

Skeletal

Question 11

Striated

Answer 11

Skeletal

Question 12

Involuntary

Answer 12

Cardiac/smooth

Question 13

Found in heart

Answer 13

Cardiac

Question 14

Unstriated

Answer 14

Skeletal/cardiac

Question 15

Usually attached to bones

Answer 15

Skeletal

Question 16

Longest individual cells

Answer 16

Skeletal

Question 17

Nonstriated

Answer 17

Smooth

Question 18

Does the length of actin and myosin filaments change during mucks contraction?

Answer 18

No

Question 19

This is essential for maintaining posture

Answer 19

Tone

Question 20

The third phase (period) of a muscle twitch contraction

Answer 20

Relaxation

Question 21

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

Answer 21

Mitochondria

Question 22

State of limpness in which muscle tone is lost

Answer 22

Flaccid

Question 23

The cytoplasm of a muscle fiber

Answer 23

Sarcoplasm

Question 24

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

Answer 24

Muscle tissue

Question 25

Skeletal muscles have a ____ blood supply and a ____ nerve supply

Answer 25

Good/good

Question 26

All the muscle fibers in a ____ must contract or relax together

Answer 26

Motor unit

Question 27

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

Answer 27

Sodium ions

Question 28

The ions are necessary to trigger muscle contraction

Answer 28

Calcium ions

Question 29

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

Answer 29

Creatine

Question 30

The storage form of glucose in our liver and muscles

Answer 30

Glycogen

Question 31

This anaerobic process provides enough energy for 30-40 seconds of maximal activity

Answer 31

Glycolysis

Question 32

Connective tissue that attaches muscle to bone

Answer 32

Tendon

Question 33

The source of energy for muscle contraction

Answer 33

ATP

Question 34

Another name for an action potential

Answer 34

Nerve impulse

Question 35

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

Answer 35

Oxygen

Question 36

Another name for muscle cells

Answer 36

Muscle fibers

Question 37

The cell membrane of muscle cells

Answer 37

Sarcolemma

Question 38

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

Answer 38

Striations

Question 39

A single nerve fiber and the muscle fibers it supplies

Answer 39

Motor unit

Question 40

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

Answer 40

Acetylcholine (Ach)

Question 41

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

Answer 41

Latent period

Question 42

Two types of skeletal muscle contractions needed for normal body movements

Answer 42

Isotonic/tetanus

Question 43

The connection between a nerve fiber and a muscle fiber

Answer 43

Neuromuscular junction

Question 44

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

Answer 44

Twitch

Question 45

Most of the ca+2 is found here when a fuscle fiber is relaxed

Answer 45

Sarcoplasmic treticulum

Question 46

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

Answer 46

Rigor Mortis

Question 47

Name the major functions of muscles

Answer 47

Movement, stabilize, body position, regulates organ volume, moving substances, heat production

Question 48

The neurotransmitter released from the synaptic vesicles of neurons supplying skeletal muscle

Answer 48

Ach

Question 49

The thick myofilament that has enlarged heads to form cross bridges

Answer 49

Myosin