Test 5

Question 1

What is the role of tropomysin in skeletal muscles?

Answer 1

Blocking myosin binding sites on actin

Question 2

What structure in skeletal muscle cells functions in calcium storage?

Answer 2

Sarcoplasmic Reticulum

Question 3

During Muscle contraction, myosin cross bridges attach to which active sites?

Answer 3

actin filaments

Question 4

Which of the following surrounds the individual muscle cell?

Answer 4

Endomysium

Question 5

Rigor Mortis occurs because _____

Answer 5

No ATP is to release attached actin and myosin molecules

Question 6

The oxygen-binding protein found in muscle cells is _____

Answer 6

Myoglobin

Question 7

The contractile units of skeletal muscles are ____

Answer 7

Myofibrlils

Question 8

What is the functional unit if a skeletal muscle called?

Answer 8

sacromere

Question 9

Incomplete glucose oxidation leads to formation of _______

Answer 9

lactic acid

Question 10

The sliding filament model of contraction involves ________.

Answer 10

actin and myosin sliding past each other and overlapping

Question 11

After nervous stimulation stops, what prevents ACh from continuing to stimulate contraction?

Answer 11

acetylcholinestrase destroying the ACh

Question 12

If a muscle were stretched to the point where thick and thin filaments no longer overlapped ___

Answer 12

no muscle tension could be generated

Question 13

Which muscle type is responsible for vasodilation

Answer 13

smooth

Question 14

Curare can bind to the ACh receptors, what are the effects

Answer 14

Curae will only affect muscles with Ach receptors

Question 15

Which of the following is likely to be a symptom of myasthenia gravis?

Answer 15

weakness of muscle

Question 16

Only ________ muscle cells are multinucleated.

Answer 16

skeletal

Question 17

The end of the muscle that is attached to the part of the body in motion

Answer 17

insertion

Question 18

The enzyme ________ is present in the synaptic cleft. Stops the neutotransmitters stimulation

Answer 18

acetyl

Question 19

Which muscle is branched

Answer 19

cardiac

Question 20

Muscles only pull, never push

Answer 20

true

Question 21

Deltoid is prime mover in arm

Answer 21

true or false

Question 22

Which is a synergist in plantar flexion?

Answer 22

soleous

Question 23

Muscles of facial expression insert into skin

Answer 23

true

Question 24

Which is not a muscle of respiration?

Answer 24

latissimus dorsi

Question 25

What is a muscle that provides the major force for producing a specific movement called?

Answer 25

agonist

Question 26

When the term biceps, triceps, or quadriceps forms part of a muscle's name, what does it mean

Answer 26

the muscles has 2, 3, or 4 orgins respectively

Question 27

The most powerful muscle in the body is the ________.

Answer 27

quadricepts femoris

Question 28

What does the term levator mean?

Answer 28

the muscle levates

Question 29

The supraspinatus is on the posterior aspect of the scapula above the spine. What is its action

Answer 29

abduction, stabalize shoulder, prevent downward dislocation

Question 30

Which of the following muscles is NOT a rotator cuff muscle?

Answer 30

levator scapulae

Question 31

Which of the following muscles is involved in producing horizontal wrinkles in the forehead?

Answer 31

frontal belly of the epicranius

Question 32

Which of the following muscles crosses one leg over the other?

Answer 32

sartorius

Question 33

Which of the following muscles inserts to the posterior calcaneus via the calcaneal tendon?

Answer 33

gastronemius

Question 34

Which of the following is NOT a member of the hamstrings

Answer 34

gracilis

Question 35

The sternocleidomastoid muscle inserts on the ________.

Answer 35

mastoid process

Question 36

In general, a muscle that crosses on the anterior side of a joint produces ________.

Answer 36

flexion

Question 37

Which muscle(s) is (are) contracted to exhale forcibly?

Answer 37

internal intercostals and rectus abdominus

Question 38

Which of the following muscles is a flexor of the thigh?

Answer 38

abductor magnus

Question 39

The ________ is the main chewing muscle

Answer 39

masseter

Question 40

Protrusion of the small intestine through a weak point in the abdominal wall is called a

Answer 40

hernia