muscle

Question 1

Muscle fatigue is the result of the lack of_____and the production of ____

Answer 1

oxygen and ATP

Question 2

The mechanical force of contraction (shortening) is generated by:

Answer 2

actin and myosin

Question 3

A skeletal fasciculus is surrounded by a connective tissue wrapping called the:

Answer 3

perimysium

Question 4

Myosin is the primary component of the:

Answer 4

thick filament

Question 5

In response to a nerve impulse, the electrical charges on the sarcolemma are
reversed. This is called:

Answer 5

depolarization

Question 6

The neurotransmitter involved with skeletal muscle contraction is:

Answer 6

Acetylcholine (ACh)

Question 7

In skeletal muscle calcium ions are stored and released from the:

Answer 7

sarcoplasmic reticulum (SR)

Question 8

Myofilaments consists of:

Answer 8

thick filaments (myosin) and thin filaments (actin)

Question 9

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for

Answer 9

contractions

Question 10

At each end of the muscle, the collagen fibers of the epimysium, and each perimysium and endomysium, come together to form a

Answer 10

tendon

Question 11

Nerves and blood vessels that service a muscle fiber are located in the connective tissues of its

Answer 11

endomysium

Question 12

A fascicle is

Answer 12

bundle of skeletal muscle fibers

Question 13

Interactions between actin and myosin filaments of the sarcomere are responsible
for

Answer 13

muscle contraction

Question 14

The advantage of having many nuclei in a skeletal muscle fiber is

Answer 14

ability to produce large amounts
of muscle protein

Question 15

Describes the term sarcomere

Answer 15

the main functional unit of muscle
fiber in the skeletal muscle

Question 16

The narrow space between the synaptic terminal and the muscle fiber is the

Answer 16

synaptic cleft

Question 17

Active sites on the actin become available for binding after

Answer 17

myosin binds to troponin

Question 18

When acetylcholine binds to receptors at the motor end plate, the end plate
membrane becomes

Answer 18

opens to ions

Question 19

Synaptic vesicles contain neurotransmitters that are released by_______ when the action potential arrives.

Answer 19

exocytosis

Question 20

V A patient takes a medication that blocks ACh receptors of skeletal muscle fibers. What is this drug’s effect on skeletal muscle contraction?

Answer 20

reduces contraction

Question 21

The rapid rise and fall in force produced by a muscle fiber after a single action
potential

Answer 21

twitch