Chapter 10

Question 1

The component of a muscle fiber that quickly transports a muscle impulse from the sarcolemma throughout the entire muscle fiber is called the…

Answer 1

Transverse Tubule (T-tubule)

Question 2

Ability to return to original length

Answer 2

elasticity

Question 3

Ability to pass an electrical charge along a cell’s plasma membrane

Answer 3

Conductivity

Question 4

Active generation of force

Answer 4

contractility

Question 5

Ability to extend in length

Answer 5

extensibility

Question 6

Ability to respond to stimuli

Answer 6

Excitability

Question 7

Your school wins the homecoming football game against its biggest rival. You watch as the smallest cheerleader tries to lift up the heaviest linebacker in her excitement. As she strains against his 300 lb. load and does not move him, what type of muscle contraction are her muscles experiencing?

Answer 7

Isometric

Question 8

Check all that are a function of skeletal muscle tissue.
-Regulation of blood PH
-Body movement
-Maintenance of body posture
-Heat production
- Regulating elimination of materials
-Protection and support

Answer 8

-Body movement
-Heat production
-Regulating elimination of materials
-Maintenance of body posture
-Protection and support

Question 9

What is the primary neurotransmitter at the neuromuscular junction?

Answer 9

Acetylcholine

Question 10

True or False: The area between the presynaptic nerve cell and the postsynaptic muscle cell is termed the synaptic cleft.

Answer 10

True

Question 11

Thin transverse protein structure in the center of the H zone

Answer 11

M line

Question 12

This area contain thins filaments but no thick filaments

Answer 12

I band

Question 13

This area contains the entire thick filament

Answer 13

A band

Question 14

This is a thin transverse protein structure in the middle of the I band

Answer 14

Z disc

Question 15

Surrounds the fascicles

Answer 15

Perimysium

Question 16

Surrounds the whole skeletal muscle

Answer 16

Epimysium

Question 17

Surrounds the fascicles

Answer 17

Perimysium

Question 18

After wearing a cast on your wrist for several weeks, you notice that your forearm muscles appear smaller and are weaker than before. This wasting of muscle tissue is termed muscle ______________.

Answer 18

Atrophy

Question 19

Also called a sphincter because its contraction closes off an opening.

Answer 19

Circular

Question 20

A high endurance type of arrangement that is not very strong

Answer 20

Parallel

Question 21

Triangular muscle with common attachment site

Answer 21

Convergent

Question 22

One or more tendons in the muscle body

Answer 22

Pennate

Question 23

Check all that are proteins of thin filaments.
-Myosin
-Actin
-Troponin
-Titin
-Tropomyosin

Answer 23

-Actin
-Troponin
-Tropomyosin

Question 24

The specialized region of the sarcolemma that has folds and indentations to increase the membrane surface area covered by the synaptic knob is the…

Answer 24

Motor end plate

Question 25

At the ends of muscles, the connective tissues merge to form a __________, which attaches the muscle to other structures.

Answer 25

Tendon

Question 26

True or False: Individual muscle fibers run the entire length of a muscle.

Answer 26

True

Question 27

Internal membrane complex; stores calcium ions in a skeletal muscle fiber

Answer 27

Sarcoplasmic reticulum

Question 28

True or False: When a motor unit is sufficiently stimulated, all of the muscle fibers in that motor unit will contract.

Answer 28

True