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WorksheetsSkeletal and Smooth Muscle Quiz C
Total questions: 21
Worksheet time: 1hrs 3mins
Name
Class
Date
1.
What is the H zone of a sarcomere?
a)
Area with only actin
b)
Area with only myosin
c)
Area with both actin and myosin
d)
Area with Z lines
2.
Which protein is found in the I band?
a)
Myosin
b)
Actin
c)
Troponin
d)
Tropomyosin
3.
Which ion triggers muscle contraction?
a)
Sodium
b)
Potassium
c)
Calcium
d)
Magnesium
4.
Which neurotransmitter initiates muscle contraction?
a)
Dopamine
b)
Acetylcholine
c)
Serotonin
d)
Norepinephrine
5.
What is realeased to degrade Acetylcholine at the end of a contraction?
a)
ATPase
b)
Acetylcholinesterase
c)
Creatine kinase
d)
Lactase
6.
What is the smallest contractile unit of a muscle?
a)
Myofibril
b)
Fascicle
c)
Muscle fiber
d)
Sarcomere
7.
Which structure connects muscle to bone?
a)
Epimysium
b)
Endomysium
c)
Perimysium
d)
Tendon
8.
Which part of the sarcomere defines its boundaries?
a)
A band
b)
Z line
c)
H zone
d)
M line
9.
Which filament is thick and golf-club shaped?
a)
Actin
b)
Myosin
c)
Troponin
d)
Tropomyosin
10.
What is the role of troponin in muscle contraction?
a)
Blocks active sites
b)
Stores calcium
c)
Binds calcium and moves tropomyosin
d)
Breaks down ATP
11.
What is the first step in muscle contraction?
a)
ATP binds to myosin
b)
ACh binds to receptors
c)
Ca²⁺ enters sarcoplasmic reticulum
d)
Myosin pulls actin
12.
Order the avenues muscles use to employ ATP
a)
Myokinase, Anerobic glcolysis, Aerobic Respiration, Creatine Phosphate
b)
Anaerobic glycolysis, Myokinase, Aerobic Respiration, Creatine Phosphate
c)
Myokinase, creatine phosphate, aerobic respiration, anaerobic glcolysis
d)
Creatine Phosphate, Myokinase, Anaerobic glcolysis, Aerobic respiration
13.
Which energy system produces lactic acid?
a)
Aerobic respiration
b)
Direct phosphorylation
c)
Anaerobic glycolysis
d)
ATP synthase
14.
Which energy system produces the most ATP?
a)
Direct phosphorylation
b)
Anaerobic glycolysis
c)
Aerobic respiration
d)
ATPase
15.
What is the primary energy source during rest?
a)
Anaerobic metabolism
b)
Aerobic metabolism
c)
Creatine phosphate
d)
Glycolysis
16.
Which muscle contraction shortens the muscle?
a)
Isometric
b)
Eccentric
c)
Concentric
d)
Relaxation
17.
Which muscle contraction lengthens the muscle?
a)
Isometric
b)
Eccentric
c)
Concentric
d)
Relaxation
18.
Which muscle contraction maintains length under tension?
a)
Isometric
b)
Eccentric
c)
Concentric
d)
Relaxation
19.
What happens to muscles with extended exercise?
a)
Atrophy
b)
Adaptation and growth
c)
No change
d)
Dehydration
20.
True or False: Smaller motor size correlates to more muscle precision?
a)
True
b)
False
21.
Where is smooth muscle found?
a)
Heart
b)
Lungs
c)
Blood vessels and intestines
d)
Skin
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