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WorksheetsSliding filament theory
Total questions: 40
Worksheet time: 27mins
Name
Class
Date
1.
The gap between a neuron and a muscle cell: (#4 in the diagram)
a)
synaptic cleft
b)
sarcolemma
c)
vesicle
d)
Ca2+ ion
2.
A bundle of fascicles best describes a
a)
muscle fiber
b)
muscle tissue
c)
myofibril
d)
tendon
3.
What layer of connective tissue covers the muscle fiber?
a)
epimysium
b)
endomysium
c)
perimysium
4.
The neurotransmitter stored in the axon terminal identified as #3
a)
Acetylcholine
b)
Protein Channel
c)
Calcium Ion (Ca2+)
d)
Syanptic Cleft
5.
The organelle that stores ACh in the axon is identified as #4
a)
Motor Neuron
b)
Axon Terminal of Motor Neuron
c)
Sarcolemma
d)
Vesicle
6.
The specialized part of the cell membrane of the muscle fiber identified as #5
a)
Sodium ion (Na+)
b)
Axon Terminal of Motor Neuron
c)
motor end plate
d)
Vesicle
7.
The organelle containing actin and myosin identified as #9
a)
ACh
b)
Sarcolemma
c)
Vesicle
d)
Myofibril
8.
This is a neurotransmitter used to create a muscle impulse
a)
Acetylcholine
b)
Calcium Ions (Ca2+)
c)
Sodium Ions (Na+)
d)
Protein Channels
9.
Muscles are attached to bones by _____.
a)
Ligaments
b)
Tendons
c)
Cartilage
d)
Axons
10.
The organelle that contains actin and myosin.
a)
Tendon
b)
myofilament
c)
myofibril
d)
Fiber
11.
Another name for a muscle cell.
a)
Fiber
b)
Sacrolemma
c)
Sacromere
d)
Fascicle
12.
Contractile unit of a muscle.
a)
sarcomere
b)
motor unit
c)
fascicle
d)
myofibril
13.
A bundle of muscle cells.
a)
sarcomere
b)
fiber
c)
fascicle
d)
Tendon
14.
Thick filaments are in a myofibril are
a)
ATPase
b)
Sarcoplasmic reticulum
c)
Actin
d)
Myosin
15.
Thin filaments in a myofibril are
a)
Sarcomeres
b)
Sarcoplasm
c)
Actin
d)
Myosin
16.
The plasma membrane of a skeletal muscle cell is called the:
a)
sarcomere
b)
myofilament
c)
sarcolemma
d)
sarcoplasm
17.
The functional unit of the muscle cell is the:
a)
Sarcomere
b)
Osteon
c)
Myofilament
d)
Muscle fiber
18.
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
19.
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
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.
The energy needed to perform a muscle contraction comes directly from
a)
ATP
b)
Oxygen
c)
Glucose
d)
Calcium
22.
Cellular respiration that occurs without oxygen present is called
a)
aerobic
b)
anaerobic
c)
isotonic
d)
isometric
23.
The neurotransmitter that signals muscle contraction is called...
a)
Ach
b)
Myosin
c)
Actin
d)
Calcium
24.
Region where a motor neuron comes in close contact with a muscle cell.
a)
neurotransmitter
b)
muscular dystrophy
c)
muscle tension
d)
neuromuscular junction
25.
The Ions that are responsible for removing Troponin from Tropomyosin.
a)
Sodium
b)
Calcium
c)
Potassium
d)
Magnesium
26.
enzyme that breaks down the muscle cell neurotransmitter and ends the impulse
a)
lactase
b)
sucrase
c)
lipase
d)
acetylcholinterase
27.
___ and ___ are regulatory proteins bound to actin.
a)
Troponin and tropomyosin
b)
Myosin and actin
c)
Calcium and Oxygen
d)
Glycogen and hemoglobin
28.
What is the structure that stores the Calcium in the muscle cell.
a)
Sarcoplasm
b)
Sarcolemma
c)
Sarcoplasmic Reticulum
d)
Myoglobin
29.
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
30.
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.
31.
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
32.
Axon terminal is represented by
a)
1
b)
2
c)
3
d)
4
33.
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
34.
Z represents
a)
Dendrite
b)
Axon Terminal
c)
Neurotransmitters
d)
Synapse
35.
The axon terminal is represented by
a)
7
b)
8
c)
9
d)
10
36.
The sarcolemma is represented by
a)
9
b)
10
c)
11
d)
12
37.
The receptors are represented by
a)
8
b)
9
c)
10
d)
11
38.
What state is the sarcomere in #1
a)
Relaxed
b)
Contracting
c)
Fully Contracted
d)
None of the above
39.
What state is the sarcomere in #2
a)
Relaxed
b)
Contracting
c)
Fully Contracted
d)
None of the above
40.
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.
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