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WorksheetsMuscle Test Review
Total questions: 35
Worksheet time: 18mins
Functions of the muscle system includes all except:
Immunity
Heat production
Body movement
Stabilize joints
Which thin filament protein bind to Ca during muscle contraction?
Actin
Myosin
Troponin
Tropomyosin
Which muscle characteristic allows the muscle to return to resting length after contraction?
Contractility
Excitability
Extensibility
Tension
What is the contractile unit of the muscle?
Z disk
Sarcomere
Muscle fiber
Muscle cell
What protein makes up the thick filaments?
Troponin
Tropomyosin
Myosin
Actin
What part of the muscle fiber stores Ca ions and releases them when stimulated?
T tubule
Sarcolemma
Nucleus
Sarcoplasmic reticulum
What is the name of the neurotransmitter that is released from the neuron to the sarcolemma?
Acetylcholine
Acetone
ATP
Calcium
Which of these occurs last during a muscle contraction?
The nerve signal reaches the neuromuscular junction
Ach is released and opens Na ion channels
The sarcomere shortens
The myosin binds to the actin
Which of these occurs first during a muscle contraction?
The nerve signal reaches the neuromuscular junction
Ach is released and opens Na ion channels
The sarcomere shortens
The myosin binds to the actin
The green arrows are pointing at the border between sarcomeres called the.....
M Line
H Line
Z disk
I Line
Covers the binding sites preventing actin from binding with myosin heads
Troponin
Tropomyosin
Actin
Myosin
What happens to the levels of calcium in this type of contraction?
Remains high, so muscle continues to contract
Calcium is released from SR, some retreat back during relaxation, but not all
Calcium is used up completely
There is no calcium used in this contraction
Found in the heart
smooth
cardiac
skeletal
all
Found in the walls of hollow organs; like intestines and the bladder
smooth
cardiac
skeletal
all
Use to move materials through contractions
smooth
cardiac
skeletal
all
Name the following in order from largest to smallest:
muscle, muscle fascicle, muscle cell, myofibril, filaments
muscle, muscle fascicle, muscle cell, filaments, myofibril
muscle, muscle cell, muscle fascicle, myofibril, filaments
muscle, muscle cell, muscle fascicle, filaments, myofibril
Produced as a result of anaerobic respiration
lactic acid
oxygen
carbon dioxide
water
Aerobic respiration requires
lactic acid
oxygen
carbon dioxide
water
In order to make ATP from ADP, creatine phosphate (CP) transfers
oxygen
phosphate
adenosine
potassium
How many ATP is acquired during aerobic respiration?
1
2
4
36
When the muscle is ready to contract, what is released from the sarcoplasmic reticulum?
ATP
myosin
actin
calcium 2+
Calcium binds to the proteins found on actin. What effect does this have?
The proteins pull on myosin to contract the muscle
The proteins move over and expose where myosin can bind
The proteins move over and expose where ATP can bind
The proteins pull on actin to contract the muscle
The H zone changes size during a muscle contraction.
True
False
The entire muscle is encased by connective tissue called the
sacromere
sarcoplasm
myosin
epimysium
The _______________ covers bundles of cells (fascicles) within the muscle.
endomysium
perimysium
sarcoplasm
tendon
the cytoplasm of a muscle cell is called the
myosin
actin
fascia
sarcoplasm
A _____ is the name for a single motor neuron and all of the muscle cells it stimulates.
synapse
axon terminal
motor unit
action potenial
Slow-twitch fibers contract quickly.
True
False
What type of contraction results in the shortening of a muscle?
concentric
eccentric
isometric
isokenetic
Compared to skeletal muscle, smooth muscle
contracts more slowly and relaxes more slowly
contracts more slowly and relaxes more rapidly
contracts more rapidly and relaxes more slowly
contracts more rapidly and relaxes more rapidly
Rigor mortis that occurs in skeletal muscles a few hours after death is due to
excessive ATP, which prevents muscle relaxation
lack of ATP, which prevents muscle relaxation
excessive ATP, which causes muscle contraction
None of these
