Quiz 2 - Muscle Tissue

Question 1

A type of muscle that is both striated and involuntary is?

Answer 1

cardiac muscle tissue

Question 2

Smooth muscle tissue is found:

Answer 2

lining hollow organs and tubes

Question 3

Which ion in the muscle tissue is responsible for changing the shape of the regulatory proteins to expose myosin binding sites on actin?

Answer 3

calcium

Question 4

The sarcolemma is the:

Answer 4

cell membrane of a myofiber

Question 5

Thick myofilaments are made mostly of:

Answer 5

Thick myofilaments are made mostly of myosin

Thin myofilaments are made mostly of actin

Question 6

The characteristic of muscle tissue which is the ability to respond to certain stimuli by producing electrical signals called action potentials is known as…

Answer 6

excitability

Question 7

The ability of a muscle to return to its original shape after contraction or extension is known as…

Answer 7

elasticity

Question 8

A motor unit is

Answer 8

a motor neuron plus all the skeletal muscle fibers it stimulates

Question 9

Sarcomeres are separated by each other by the

Answer 9

z disc

Question 10

The sliding filament theory says that myofibers shorten when:

Answer 10

thin myofilaments are pulled toward the center of the sarcomere by swiveling of the myosin heads.