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WorksheetsSliding Filament Model
Total questions: 26
Worksheet time: 26mins
Name
Class
Date
1.
Muscles are attached to bones by _____.
a)
Ligaments
b)
Tendons
c)
Cartilage
d)
Axons
2.
Contractile unit of a muscle.
a)
sarcomere
b)
motor unit
c)
fascicle
d)
myofibril
3.
A bundle of muscle cells.
a)
sarcomere
b)
fiber
c)
fascicle
d)
Tendon
4.
Ribbon like organelle found in muscle cells that have a banded appearance
a)
sarcomere
b)
myofibril
c)
fascicle
d)
actin
5.
Thick filaments are in a myofibril are
a)
ATPase
b)
Sarcoplasmic reticulum
c)
Actin
d)
Myosin
6.
Thin filaments in a myofibril are
a)
Sarcomeres
b)
Sarcoplasm
c)
Actin
d)
Myosin
7.
The plasma membrane of a skeletal muscle cell is called the:
a)
sarcomere
b)
myofilament
c)
sarcolemma
d)
sarcoplasm
8.
The functional unit of the muscle cell is the:
a)
Sarcomere
b)
Osteon
c)
Myofilament
d)
Muscle fiber
9.
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
10.
Calcium:
a)
causes ATP binding to actin
b)
increases the action potential along the sarcolemma
c)
binds to proteins on myosin
d)
triggers the binding of myosin to actin
11.
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.
12.
The energy needed to perform a muscle contraction comes directly from
a)
ATP
b)
Oxygen
c)
Glucose
d)
Calcium
13.
The gap between a neuron and a muscle cell: (#4 in the diagram)
a)
synaptic cleft
b)
sarcolemma
c)
vesicle
d)
Ca2+ ion
14.
A bundle of fascicles best describes a
a)
muscle fiber
b)
muscle tissue
c)
myofibril
d)
tendon
15.
What layer of connective tissue covers the muscle fiber?
a)
epimysium
b)
endomysium
c)
perimysium
16.
The neurotransmitter stored in the axon terminal identified as #3
a)
Acetylcholine
b)
Protein Channel
c)
Calcium Ion (Ca2+)
d)
Syanptic Cleft
17.
A ___extends from one Z disc to another Z disc.
a)
Sarcolemma
b)
Neuromuscular junction
c)
Sarcomere
d)
Motor end plate
18.
___slides inward during muscle contraction.
a)
actin
b)
myosin
19.
Region where a motor neuron comes in close contact with a muscle cell.
a)
neurotransmitter
b)
muscular dystrophy
c)
muscle tension
d)
neuromuscular junction
20.
Skeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.
a)
Muscle cell
b)
Neuron
c)
Gland
d)
None of the above
21.
The boundary between sarcomeres, named after its shape. (#5)
a)
A-band
b)
H zone
c)
I-band
d)
Z line
22.
The region between two Z lines or discs (#1)
a)
sarcolemma
b)
sarcomere
c)
A band
d)
Endomysium
23.
The light colored band (#7)
a)
I band
b)
A band
c)
Z line
d)
M line
24.
The dark band (#6)
a)
I band
b)
A band
c)
Z line
d)
M line
25.
#3
a)
actin
b)
myosin
c)
sarcomere
d)
I band
26.
#4
a)
actin
b)
myosin
c)
sarcomere
d)
Z line
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