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WorksheetsMuscle Physiology
Total questions: 27
Worksheet time: 16mins
Name
Class
Date
1.
When a muscle is relaxed and in a lengthened position, what is the relationship between actin filaments?
a)
They are on top of one another
b)
They are beside each other
c)
They are close to each other
d)
They are far apart from each other
2.
Z represents
a)
Dendrite
b)
Axon Terminal
c)
Neurotransmitters
d)
Synapse
3.
Once calcium is released, it will
a)
attaches to myosin head
b)
attaches to receptors
c)
attaches to tropomyosin
d)
attaches to troponin
4.
Number 3 represents which of the following events
a)
action potential reaches the axon terminal
b)
sodium rushes into the muscle fiber
c)
potassium leaving the muscle fiber
d)
ACh crossing the synaptic cleft
5.
What are the two ions transported across the membrane in an action potential?
a)
O2- and K+
b)
K+ and Na+
c)
Ca+2 and B+3
d)
Na+1 and Cl
6.
Which of the following is NOT a muscle function?
a)
Movement of skeleton
b)
Heat generation
c)
Transport substances around body
d)
Moves neurons around body
7.
What is the name of the protein myofilament that pulls the actin towards the center of the Sarcomere?
a)
Fascicle
b)
Actin
c)
Myosin
d)
Titin
8.
Which of the following is the name given to the connective tissue that covers of a muscle fascicle or bundle of muscle?
a)
Endomysium
b)
Perimysium
c)
Epimysium
d)
Myofilament
9.
Which one of the following is a key characteristic of slow twitch muscle fibers?
a)
They contain large amounts of Mitochondria
b)
They are fast to fatigue
c)
They are recruited last
d)
They contain low numbers of Mitochondria
10.
Which one of the following is a key characteristic of Fast Twitch B muscle fibers?
a)
They are Red in color, meaning they contain a lot of mitochondria
b)
They contract rapidly with great force but fatigue fast (as they use creatine phosphate pathway)
c)
They are recruited for long duration activities
d)
They contain high numbers of Mitochondria
11.
Inside a muscle cell that is at rest, the internal charge is _______.
a)
Negative
b)
Positive
c)
Neutral
12.
When Sodium ions fly into the muscle cell, it's said to be __________.
a)
Repolarizing
b)
Depolarizing
c)
Electrically neutral
d)
none of the above
13.
Identify one factor that can cause the first sodium channel to open in a muscle cell.
a)
Calcium ions being released from the sarcoplasmic reticulum.
b)
Acetylcholine being released from the motor neuron
c)
Calcium ions binding to troponin
d)
ATP causing the myosin heads to pop up.
14.
enzyme that breaks down the muscle cell neurotransmitter and ends the impulse
a)
lactase
b)
sucrase
c)
lipase
d)
acetylcholinterase
15.
the chemical that accumulates in muscles when oxygen is depleted
a)
myoglobin
b)
hemoglobin
c)
lactic acid
d)
carbon dioxide
16.
What two chemicals are necessary for muscle contraction to occur?
a)
Niacin and Potassium
b)
Calcium and ATP
c)
Sodium and Potassium
d)
Ach and Potassium
17.
situation in which muscle loses its ability to contract, due to being used strenuously for a long period of time
a)
muscle pain
b)
muscle cramp
c)
muscle fatigue
d)
oxygen debt
18.
What is atrophy?
a)
An increase in muscle mass
b)
A decrease in muscle mass
19.
What is hypertrophy?
a)
An increase in muscle mass
b)
A decrease in muscle mass
20.
Which statement about a tetanus is false?
a)
It is a maximum sustained contraction
b)
It is caused by stimulating contraction before a muscle has time to relax
c)
It remains contracted until the muscle fatigues
d)
It is caused by allowing the muscle to relax too many times between contractions.
21.
minimal amount of stimulus needed to cause a muscle to contract
a)
all or none principle
b)
threshold stimulus
c)
neurotransmitter
d)
neuromuscular junction
22.
What type of muscle moves liquids and solids through passageways?
a)
Cardiac
b)
Smooth
c)
Skeletal
23.
What holds oxygen in muscles cells?
a)
Myofibrils
b)
Myoglobin
c)
Fascicles
24.
What is the name of the muscles found between the ribs and cause the ribs to move during breathing?
a)
Intercostals
b)
Masseter
c)
Peroneus longus
d)
Deltoid
25.
A motor unit is made up of _______________.
a)
all the muscle fibers within a given muscle
b)
a motor neuron and the muscle fibers it innervates
c)
all the neurons going into an individual section of the body
d)
a fascicle and a nerve
26.
The muscle that contracts during movement is called the
a)
agonist
b)
antagonist
c)
synergist
27.
Creatine phosphate provides energy to muscle cells by
a)
becoming oxidized and losing phosphate to ATP to form ADP
b)
becoming oxidized and losing phosphate to ADP to form ATP
c)
providing ATP directly to muscle cells
d)
providing ADP directly to muscle cells
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