Muscular Quiz
1.
The endomysium, perimysium and epimysium are all
a.
b.
c.
d.
2.
A motor unit
a.
b.
c.
d.
3.
muscular activity tends to inhibit certain areas of the nervous system
there is no obvious relation between it and the endocrine system
the heart muscle functions in the same way that skeletal muscle does
the muscular system is interrelated to and interdependent on all other organ systems
A sheetlike muscle on the anterolateral neck that does not originate or insert on bone is called the
a.
b.
c.
d.
7.
arm extension
arm flexion
rotation
abduction
When observing relationships between the muscular system and other organ systems in the body we see that
a.
b.
c.
d.
6.
cardiac muscle
tendons
smooth muscle
skeletal muscle
Starting from anatomical position, when the elbow is moved behind the body it is called
a.
b.
c.
d.
5.
is one neuron and all the muscle cells it stimulates
is the amount of acetylcholine used to produce one contraction
is the contractile unit of a muscle cell
is the site of attachment of a neuron and the muscle at the motor end plate
The terms visceral, nonstriated, and involuntary best describe
a.
b.
c.
d.
4.
muscle fibers
connective tissues
muscle cells
tendinous attachments to bone
rectus
orbicularis oris
sternocleidomastoid
platysma
In order for muscles to move bones they must have all the following characteristics except
a.
they can pull but not push
b.
c.
d.
8.
The negative effects of using anabolic steroids for increasing muscle mass include all but
a.
b.
c.
d.
9.
most of the muscle mass is located proximal to the joint crossed
they must cross two successive joints
during contraction the point of insertion moves toward the point of origin
decreased fertility
increased psychiatric problems
liver damage
enhanced cardiovascular function
Which muscle is the prime mover of hip flexion?
a.
b.
c.
d.
iliopsoas
semitendinosus
biceps femoris
semimembranosus
10. The muscle which is really a composite of three muscles that span the length of the vertebral column is the
a.
b.
c.
d.
11.
latissimus dorsi
trapezius
erector spinae
hamstring
Which of these is not a function of skeletal muscle?
a.
b.
c.
d.
pumps blood
maintains posture
produces movement when muscles shorten
generates heat
12. Which of these is NOT true about aerobic exercise?
a.
b.
c.
d.
it
it
it
it
improves digestion
increases the number of mitochondria in muscle cells
makes one more coordinated
dramatically increases muscle size
13. In anatomical position, the hand has been
a.
b.
c.
d.
pronated
supinated
rotated
everted
14. ______ help the muscle that has the major responsibility for causing a specific action.
a.
b.
c.
d.
synergists
fixators
antagonists
prime movers
15. The neurotransmitter ____, released from axon terminals of motor neurons, stimulates an action potential in a muscle cell, causing it
to contract.
a.
b.
c.
d.
ATP
action potential
calcium
acetylcholine
16. According to the sliding filament theory of muscle contraction
a.
b.
c.
d.
calcium causes myosin heads to release from actin when contraction is over
tendons push the muscle ends together which causes sarcomere shortening
thick filaments made of actin and myosin walk along cross bridges toward the center of the sarcomere
sarcomeres shorten when thin filaments move toward the center of the sarcomere
17. When muscle contracts, sarcomeres
a.
b.
c.
d.
shorten
relax
release calcium
release cross bridges
18. ____ allows cross bridge release and recocking of myosin cross bridges during muscle contraction.
a.
b.
c.
d.
enzymes
ATP
calcium ions
action potentials
19. Sarcomeres are composed of
a.
b.
c.
d.
Z lines
light and dark bands
myofilaments
cross bridges
20. Which is NOT true about the gastrocnemius muscle?
a.
b.
c.
it acts as a synergist to the tibialis anterior
it allows plantar flexion of the foot
it inserts on the most posterior of the tarsal bones
d.
it originates on the distal posterior femur