WorksheetsHuman Muscle Physiology
Total questions: 10
Worksheet time: 3mins
Name
Class
Date
1.
Which of the following best describes actin filaments?
a)
A thin filament made of two intertwining strands whose subunits bind together like beads on a string
b)
A thick filament that looks like two golf clubs twisted together
c)
A small, globular regulatory protein that holds another protein in place
d)
A long, ropelike regulatory protein that spirals around another protein, covering its active sites
2.
The storage and release of calcium ions is the key function of the:
a)
sarcolemma.
b)
sarcoplasm.
c)
sarcoplasmic reticulum.
d)
mitochondrion.
3.
Which of the following is NOT a major function of muscle tissue?
a)
generating heat through contractions
b)
stabilizing joints
c)
promoting movement of body structures
d)
storing energy
4.
Which of the following statements is TRUE regarding Fast Glycolytic fibers found in skeletal muscle?
a)
They are small in diameter.
b)
They are adapted for intense bursts of anaerobically fueled movement.
c)
They have abundant mitochondria.
d)
They contract slowly, but are resistant to fatigue.
5.
The Na+/K+ pump helps a muscle cell maintain a state of:
a)
depolarization.
b)
propagation.
c)
resting membrane potential.
d)
action potential.
6.
Which of the following statements is TRUE regarding Slow Oxidative fibers found in skeletal muscle?
a)
They are large in diameter.
b)
They are adapted for intense bursts of anaerobically fueled movement.
c)
They lack mitochondria.
d)
They contract slowly, but are resistant to fatigue.
7.
Calcium ions bind to the ___ molecule in skeletal muscle cells.
a)
actin
b)
troponin
c)
tropomyosin
d)
myosin
8.
This is a band of connective tissue that surrounds whole muscles.
a)
ligament
b)
endomysium
c)
epimysium
d)
perimysium
9.
Which of the following represents the sequence that muscle action potentials must go through to excite a muscle cell?
a)
sarcolemma, axon of neuron, T tubules
b)
T tubules, sarcolemma, myofilament
c)
muscle fiber, axon of neuron, mitochondria
d)
axon of neuron, sarcolemma, T tubules
10.
Which of the following functions as a motor protein in all three types of muscle tissue?
a)
actin
b)
myosin
c)
troponin
d)
titin
100 %
