WorksheetsMuscular System
Total questions: 14
Worksheet time: 7mins
Name
Class
Date
1.
The layer of connective tissue that separates the muscle tissue into small sections is called the ______________.
a)
aponeuroses
b)
epimysium
c)
perimysium
d)
endomysium
2.
The segment of a myofibril that is called a sarcomere runs from _______________.
a)
Z-line to Z-line
b)
H-zone to H-zone
c)
A-band to A-band
d)
one end of the skeletal muscle to the other
3.
The segment of a myofibril that is called a sarcomere runs from _______________.
a)
Z-line to Z-line
b)
H-zone to H-zone
c)
A-band to A-band
d)
one end of the skeletal muscle to the other
4.
Into what does the neuron release its neurotransmitter at the neuromuscular junction?
a)
motor end plate
b)
cytoplasm of the muscle cell
c)
cisternae
d)
synaptic cleft
5.
A motor unit is made up of _______________.
a)
all muscle fibers within a given muscle
b)
a motor neuron and the muscle fiber it innervates
c)
all the neurons going into a particular section of the body
d)
a fascicle and a nerve
6.
The crossbridges involved in muscle contraction are located on the ________________.
a)
myosin
b)
actin
c)
troposin
d)
tropomyosin
7.
Which of these statements is correct regarding muscle contraction?
a)
all motor units act together
b)
Muscle contraction continues for long periods after nervous stimulation ceases.
c)
The crossbridges bind to the actin and shorten the sarcomeres.
d)
Dystrophin is not needed to strengthen the contracting muscle cell.
8.
One of the following statements about muscular responses is not true. Choose that one.
a)
A muscle fiber contracts in an all-or-none fashion.
b)
There is a slight latent period that occurs between when the stimulus arrives at the muscle and when the muscle contracts.
c)
Muscles will add motor units to a contraction, increasing the overall force of contraction.
d)
When a person is fully at rest, none of her muscles are contracting.
9.
Why can cardiac muscle fibers contract for longer periods than skeletal muscle fibers?
a)
Cardiac muscle is self-excitatory.
b)
Extracellular calcium partially controls the strength (and length) of contraction.
c)
Cisternae of T-tubules is more developed in cardiac muscle
d)
Cardiac muscle is uninucleate rather than multinucleate.
10.
Muscles that are not used, may degenerate or undergo a process of _____.
a)
hypertrophy
b)
atrophy
c)
fatigue
d)
tetany
11.
Which muscle enables you to pucker your lips for a kiss?
a)
epicranius
b)
buccinator
c)
orbicularis oris
d)
orbicularis oculi
12.
Each muscle fiber is directly surrounded by connective tissue called the _____.
a)
perimysium
b)
fascia
c)
endomysium
d)
epimysium
13.
Which term is the smallest subdivision in this group?
a)
fiber
b)
fibril
c)
filament
d)
actin
14.
The term _____ refers to the constant state of contraction of a certain number of fibers within a muscle
a)
atrophy
b)
hypertrophy
c)
tone
d)
summation
100 %
