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WorksheetsMuscle Structure and Contraction
Total questions: 25
Worksheet time: 12mins
Name
Class
Date
1.
What is the name given to a single muscle cell?
a)
Sarcolemma
b)
Sarcomere
c)
Myocyte
d)
Contractile element
2.
What is the name of the thin contractile filament found in a sarcomere?
a)
actin
b)
myosin
c)
titan
d)
troponin
3.
What is the name of the thick contractile filament found in a sarcomere
a)
actin
b)
myosin
c)
troponin
d)
titin
4.
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
5.
When a muscle is in a contracted 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
6.
What is the name given to the contraction and relaxation of a sarcomere?
a)
Muscle contraction
b)
Passive lengthening
c)
Sliding filament theory
d)
Isometric contractions
7.
How does the sarcomere shorten (contract)
a)
The myosin filaments contract
b)
The actin filaments contract
c)
The the actin is pulled by the myosin.
d)
The myosin is pulled by the actin.
8.
What is the sarcolemma?
a)
The outside covering of a muscle cell
b)
Tubes within the cell that conduct an impulse
c)
A storage area for calcium
d)
A storage area for sodium
9.
What is the purpose of a T tubule?
a)
It transports sodium
b)
It transports calcium
c)
I takes the impulse (action potential) to the inside of the muscle cell.
d)
It relaxes the muscle cell
10.
What do mitochondria do in a muscle cell?
a)
Store glucose
b)
Create ATP
c)
Use ATP
d)
Release calcium
11.
What does the sarcoplasmic reticulum do?
a)
Conducts action potentials
b)
Stores calcium
c)
Stores sodium ions
d)
Helps the muscle relax
12.
What depolarizes the muscle cell?
a)
An electrical charge from a neuron
b)
Chemicals released by a neuron
c)
Sodium
d)
A nerve impulse
13.
What is the name of the chemical released by a neuron.
a)
Acetylcholine
b)
Sodium
c)
Potassium
d)
Chlorine
14.
What does the neurotransmitter do?
a)
Stimulates the muscle cell
b)
Inhibits the muscle cell from contracting
c)
Inhibits or stimulates depending on the type of chemical
d)
Stimulates the release of calcium
15.
What is the name of the space between the nerve and the muscle cell?
a)
Junction
b)
Subneural space
c)
Synapse
d)
The final frontier
16.
What is the name of the place where a nerve meets a muscle fiber?
a)
Nerve Junction
b)
Muscle junction
c)
Hallway
d)
Neuromuscular junction
17.
What does the sarcoplasmic reticulum do?
a)
Stores sodium
b)
Releases sodium
c)
Stores ATP
d)
Stores calcium
18.
What is the name of the protein that covers the binding sites on actin?
a)
Myosin
b)
Troponin
c)
Titan
d)
Tropomyosin
19.
What does calcium do to the actin?
a)
Covers myosin binding sites
b)
Uncovers myosin binding sites
c)
Covers actin binding sites
d)
Uncovers actin binding sites
20.
What is a crossbridge?
a)
Where myosin binds to actin
b)
Where the calcium crosses into the cytoplasm
c)
Where calcium binds with troponin
d)
None of the answers are correct.
21.
What material is necessary for myosin to bind with actin?
a)
Calcium
b)
Sodium
c)
ADP
d)
ATP
22.
What does the myosin do to the actin?
a)
Nothing
b)
Pulls on it
c)
Pushes on it
d)
Breaks it into pieces
23.
What is necessary for the myosin to release the actin?
a)
ATP
b)
ADP
c)
Calcium
d)
Sodium
24.
What happens to the calcium after muscle contraction is complete?
a)
It is removed from the body
b)
It is used to build bone
c)
It is transported to the sarcoplasmic reticulum
d)
It binds to the sodium
25.
Does the muscle need to rest and recharge before it can contract again?
a)
True
b)
False
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