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Multiple Choice
Which type of muscle is unstriated, unbranched, involuntary, spindle shaped, and found in the walls of most hollow organs?
A
smooth
B
cardiac
C
epithelium
D
skeletal
Verified step by step guidance
1
Identify the characteristics of the muscle type in question: unstriated, unbranched, involuntary, and spindle-shaped.
Understand that 'unstriated' means the muscle does not have the banded appearance seen in striated muscles like skeletal and cardiac muscles.
Recognize that 'involuntary' indicates the muscle operates without conscious control, which is typical of smooth and cardiac muscles.
Note that 'spindle-shaped' refers to the tapered ends of the muscle cells, a feature of smooth muscle cells.
Consider the location: smooth muscle is commonly found in the walls of hollow organs such as the intestines, blood vessels, and bladder, aligning with the problem description.