Which Statement About Smooth Muscle Cells Is True

question 166

Multiple Choice

Which statement about smooth muscle cells is true?

• A) They are spindle-shaped and multinucleate.
• B) Their plasma membrane is insensitive to stretching.
• C) Some occur in sheets and are electrically coupled through gap junctions.
• D) Their arrangement of actin and myosin filaments is more regular than that found in skeletal and cardiac muscle cells.
• E) They occur more extensively in the walls of veins and capillaries than arteries because of the difficulty associated with returning blood to the heart against gravitational forces.

---

Definitions:

Plasma Component

The liquid part of blood that carries cells and proteins throughout the body, consisting mainly of water, electrolytes, and proteins.

Plasma

The liquid component of blood, in which blood cells are suspended.

Serum

The component of blood that remains after clotting has removed the blood cells and clotting proteins, containing antibodies and other proteins.

Formed Elements

Cells (i.e., red and white blood cells) and cell fragments (i.e., platelets) of blood.