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WorksheetsMuscular System
Total questions: 29
Worksheet time: 15mins
Name
Class
Date
1.
What are the 3 types of muscles?
a)
Cardiac, smooth and skeletal
b)
Cardiac, skeletal, prime
c)
Flexion, extension, smooth
d)
Skeletal, smooth, stringy
2.
What is smooth muscle responsible for?
a)
Responsible for voluntary body movements.
b)
Carries out mostly involuntary processes like digestion and pumping blood through arteries.
c)
Prevents the actin from rubbing with the myosin.
d)
Rigor mortis
3.
What is skeletal muscle responsible for?
a)
Responsible for voluntary body movements.
b)
Carries out mostly involuntary processes like digestion and pumping blood through arteries.
c)
Prevents the actin from rubbing with the myosin.
d)
Rigor mortis
4.
Tendons connect __________ to bone.
a)
Cartilage
b)
Bone
c)
Muscle
d)
Ligaments
5.
Myofibrils are divided into lengthwise fragments called __________.
a)
Sarcomeres
b)
Epimysium
c)
Endomysium
d)
Perimysium
6.
What are the skinny strands that attach to either ends of the sarcomere called?
a)
Myosin
b)
Fibers
c)
Actin
d)
Myofibrils
7.
What is the thicker layer of proteins in the middle of the sarcomere called?
a)
Myosin
b)
Fibers
c)
Actin
d)
Myofibrils
8.
What do troponin and tropomyosin do?
a)
Lengthening and shortening.
b)
Responsible for voluntary body movements.
c)
Carries out mostly involuntary processes like digestion and pumping blood through arteries.
d)
Prevents the actin from rubbing with the myosin.
9.
How many kinds of muscles are there in the body?
a)
5
b)
3
c)
6
d)
2
10.
Where is the cardiac muscle found?
a)
skin
b)
bones
c)
lungs
d)
heart
11.
What is a voluntary muscle?
a)
You have control over the muscle
b)
You have no control over the muscle
c)
Muscle works automatically
d)
Muscles fuse together
12.
a rod-like contractile organelle
a)
fascicle
b)
myofibril
c)
sarcomere
d)
myofilament
13.
a discrete bundle of muscle fibers
a)
fascicle
b)
myofibril
c)
sarcomere
d)
myofilament
14.
the smallest contractile unit of a myofibril
a)
fascicle
b)
sarcomere
c)
myofilament
d)
myosin
15.
connective tissue sheath that wraps entire muscle
a)
endomysium
b)
perimysium
c)
epimysium
16.
connective tissue sheath that wraps a fascicle
a)
epimysium
b)
perimysium
c)
endomysium
17.
connective tissue sheath that wraps one muscle fiber
a)
epimysium
b)
perimysium
c)
endomysium
18.
Ion channels found on sarcolemma
a)
Na + and K +
b)
Na + only
c)
Ca +
d)
Ca + and K +
19.
protrudes deep into muscle fiber to carry action potential to every last sarcomere
a)
traid
b)
T tubule
c)
sarcolemma
d)
SR
20.
states that during a muscle contraction, thin filaments slide past thick filaments and overlap to a greater degree
a)
Sliding Filament Theory of Contraction
b)
Excitation-Contraction Coupling
c)
Nerve Stimulus Theory
d)
Acetycholine Theory of Muscle Activity
21.
An electrical current propagated along a nerve or muscle cell
a)
depolarization
b)
repolarization
c)
action potential
d)
end plate potential
22.
Where a motor neuron axon meets a muscle fiber
a)
synapse
b)
neuromuscular junction
c)
cleft
d)
acetylcholinesterase
23.
the physical space that exists between a nerve and muscle cell
a)
neuromuscular junction
b)
synaptic cleft
c)
receptor
d)
imbalance
24.
A transient change in membrane potential that makes the interior of the sarcolemma become less negative
a)
depolarization
b)
repolarization
c)
hyperpolarization
25.
Which of the following contractions makes a muscle shorter?
a)
isotonic
b)
isometric
26.
Which of the following contractions makes a muscle increase its tension only?
a)
isotonic
b)
isometric
27.
Muscles require food to move..
a)
True
b)
False
28.
True or False: Without muscles you can smile
a)
False
b)
True
29.
Skeletal muscles are attached to the _________.
a)
Stomach
b)
Lungs
c)
Skeleton
d)
Involuntary Muscles
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