What Is Responsible for Initiating Contraction of Smooth Muscle

question 99

Multiple Choice

What is responsible for initiating contraction of smooth muscle?

• A) stimulation by motor neurons
• B) inhibition of acetylcholinesterase
• C) membrane potential drifting to threshold as a result of automatic changes in ion movement across the membrane
• D) excitation of the gap junctions by transmitter substance
• E) stimulation by the autonomic nervous system

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Definitions:

Epinephrine

Also known as adrenaline, it's a hormone and medication involved in regulating visceral functions (e.g., heart rate and blood pressure) and the body's fight-or-flight response.

Fight-or-Flight

A physiological response where the body prepares to confront or avoid danger.

Epinephrine

A hormone and neurotransmitter also known as adrenaline, involved in regulating visceral functions (e.g., heart rate) and the fight-or-flight response.

Brain Lesion

Any damage or injury to the brain tissue that can affect its function, caused by illness, trauma, or medical conditions.