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Where might you find smooth muscle?

  1. A
    In the heart
  2. B
    In the head and neck
  3. C
    In the walls of blood vessels
  4. D
    In the torso and limbs

Topic Flashcards

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Question

Where is smooth muscle commonly located in the body?

Answer

In walls of hollow organs and passageways, such as blood vessels, digestive tract (stomach/intestines), airways, bladder, uterus, and eyes for involuntary control.

Question

In which structure do you find smooth muscle to regulate blood flow and pressure?

Answer

Walls of blood vessels. Vascular smooth muscle contracts/relaxes to control vessel diameter, blood pressure, and organ perfusion.

Question

Why is smooth muscle present in blood vessel walls but not in the heart?

Answer

Smooth muscle lines arteries/veins for vasoconstriction; heart walls contain cardiac muscle for rhythmic pumping while smooth muscle is involuntary and non-striated.

Question

Of these options—heart, head/neck, blood vessel walls, torso/limbs—which best represents a key location for smooth muscle?

Answer

Blood vessel walls, a classic site; heart has cardiac muscle, torso/limbs have mostly skeletal muscle, head/neck has limited smooth (e.g., iris).

Question

What type of muscle is found in the walls of arteries and veins to adjust diameter?

Answer

Smooth muscle allows involuntary vasoconstriction/vasodilation to regulate blood flow, pressure, and distribution.

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Is smooth muscle found in the walls of blood vessels to control blood flow?
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