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WorksheetsMT- Muscle Physiology Quiz
Total questions: 26
Worksheet time: 13mins
Name
Class
Date
1.
Tendons connect muscle to bone.
a)
True
b)
False
2.
The __________ is a sheath of connective tissue that surrounds the fascicle of a muscle.
a)
epimysium
b)
perimysium
c)
endomysium
3.
The basic rod-like unit of a muscle cell is called the
a)
muscle fiber
b)
muscle fascicle
c)
myofibril
4.
The sheath of connective tissue that surrounds and protects each muscle fiber is called
a)
epimysium
b)
perimysium
c)
endomysium
5.
Tendons and ligaments are provided ample amounts of blood and nutrients to sustain their strength and structure.
a)
True
b)
False
6.
The thick filaments of a sarcomere are called
a)
actin
b)
myosin
7.
The thin filament component of the sarcomere is called
a)
actin
b)
myosin
8.
Each sarcomere is found between the
a)
A lines
b)
Z lines
c)
M lines
d)
H lines
9.
The myosin filaments are found within the
a)
A band
b)
B band
c)
The band
d)
I band
10.
Only the actin filaments are found within the
a)
A band
b)
H band
c)
I band
d)
M band
11.
Which type of muscle is voluntary?
a)
smooth
b)
cardiac
c)
skeletal
12.
The neurotransmitter used by the nervous system to activate skeletal muscle cells is
a)
serotonin
b)
dopamine
c)
acetylcholine
d)
GABA
13.
During the contraction of a muscle, the actin filaments move toward the M line, while the myosin filaments do not move.
a)
True
b)
False
14.
Which of the following decreases in length during a contraction?
a)
crossbridge
b)
H zone
c)
A band
d)
M line
15.
The functional unit of a myofibril is called a
a)
pectin
b)
sarcomere
c)
sarcolemma
d)
T-tubule
16.
Which filament within a sarcomere contains globular proteins, troponin, and tropomyosin?
a)
actin
b)
myosin
17.
Which muscle filament contains heads and tails?
a)
actin
b)
myosin
18.
During muscle contraction, the thin actin filaments slide over the thick myosin filaments.
a)
True
b)
False
19.
For a muscle to contract, it requires an action potential, or a impulse propagated by the nervous system.
a)
True
b)
False
20.
Which of the following ions does not play a key role in muscle contraction?
a)
sodium
b)
phosphorus
c)
calcium
21.
Calcium not only plays a key role in initiating the release of the neurotransmitter, but also bonds to _____ to initiate a muscle contraction.
a)
actin
b)
troponin
c)
tropomyosin
d)
myosin
22.
Once calcium bonds to troponin, ___________ shifts, which allows the active sites of G-actin to be exposed therefore allowing the formation of crossbridges.
a)
myosin
b)
actin
c)
tropomyosin
23.
Which of the following is not part of the thin filament?
a)
myosin
b)
F-actin
c)
troponin
d)
tropomyosin
24.
Acetylcholine is broken down by cholinesterase, which stops the contraction.
a)
True
b)
False
25.
What is required to break the crossbridges between actin and myosin filaments?
a)
water
b)
ATP
c)
sodium
d)
calcium
26.
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)
synapse
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