Smooth Muscle Physiology Quiz
Test your knowledge of smooth muscle physiology with this 10-question quiz. All questions are required.
Which of the following is a unique feature of smooth muscle compared to skeletal muscle?
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Lack of striations
Voluntary control
Presence of sarcomeres
Multinucleated fibers
Smooth muscle contraction is primarily regulated by which ion?
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Calcium
Sodium
Potassium
Magnesium
Which protein binds calcium to initiate smooth muscle contraction?
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Calmodulin
Troponin
Tropomyosin
Actin
Which of the following is NOT a characteristic of smooth muscle?
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Spindle-shaped cells
Central nucleus
Voluntary contraction
Ability to sustain contractions
Select all functions of smooth muscle in the human body.
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Regulating blood vessel diameter
Moving food through the digestive tract
Voluntary limb movement
Controlling airflow in bronchioles
Which neurotransmitter is most commonly associated with stimulating smooth muscle contraction in the gastrointestinal tract?
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Acetylcholine
Dopamine
GABA
Norepinephrine
On a scale of 1 to 5, how confident are you in your understanding of smooth muscle physiology?
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1
2
3
4
5
Which enzyme is responsible for phosphorylating myosin light chains during smooth muscle contraction?
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Myosin light chain kinase
Adenylate cyclase
Protein kinase A
Myosin phosphatase
Match the following smooth muscle types with their primary locations.
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Rows
Location
Multi-unit smooth muscle
Blood vessels
Digestive tract
Iris of eye
Uterus
Single-unit smooth muscle
Blood vessels
Digestive tract
Iris of eye
Uterus
Briefly describe one mechanism by which smooth muscle contraction can be inhibited.
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