muscles

Question 1

the muscle that serves as the prime mover during a movement is called the

Answer 1

agonist

Question 2

a muscle that decreases the size of an opening is a

Answer 2

sphincter

Question 3

this consists of a somatic motor neuron and all the skeletal muscles fibers it stimulates

Answer 3

motor unit

Question 4

which of the following is NOT a characteristic commonly used to name skeletal muscles

Answer 4

thickness of fibers

Question 5

the contractile organelles of a skeletal muscle fiber are thread-like structures called

Answer 5

myofibrils

Question 6

release of calcium from these structures triggers skeletal muscle contraction

Answer 6

terminal cisterns of the sarcoplasmic reticulum

Question 7

which of the following is NOT a major function of muscle tissue

Answer 7

production of vitamins

Question 8

all of the following are muscles of the lower limb EXCEPT

Answer 8

deltoid

Question 9

a muscle that has three origins is called a

Answer 9

tricep

Question 10

what energizes the myosin head

Answer 10

atp hydrolysis reaction

Question 11

which of the following functions as a motor protein in all three types of muscle tissue

Answer 11

myosin

Question 12

most muscles cross at least one

Answer 12

joint

Question 13

in neuromuscular junctions, synaptic vesicles containing acetylcholine are found suspended in the cytosol of

Answer 13

synaptic end bulbs

Question 14

a brief contraction of muscle fibers in a motor unit in response to a single action potential moving down the some of motor neuron is known as

Answer 14

twitch contraction

Question 15

what regulatory proteins can be found in the thin filaments of skeletal muscle fibers ?

Answer 15

tropomyosin and troponin

Question 16

which of the following is a muscle that participates in generating the facial expression of pouting

Answer 16

platsyma

Question 17

which of the following types of muscle tissue is capable of undergoing the stress relaxation response when they are stretched

Answer 17

single unit smooth muscle fibers

Question 18

if one is stabbed on the lateral side of the abdomen which abdominal muscles from superior to deep will the knife go through

Answer 18

external oblique, internal oblique, transversus abdominis

Question 19

this is the least powerful type of skeletal muscle fiber

Answer 19

slow oxidative fiber

Question 20

the outermost layer of the connective tissue surrounding a skeletal muscle

Answer 20

epimysuim

Question 21

myofibrils contain

Answer 21

contractile proteins, regulatory proteins, structural proteins

Question 22

calcium ions are released from the SR into the cytosol

Answer 22

at the beginning of a contraction

Question 23

skeletal muscle contraction will continue to occur as long as the following chemicals are available in the cytosol of the muscle fiber

Answer 23

calcium ions and ATP