Question

a characteristic of smooth muscle is:
a striated and involuntary
b unstriated and involuntary
c unstriated and voluntary
d striated and voluntary

Explanation:

Smooth muscle is a type of muscle tissue. It is called "smooth" because it lacks the striations (striped appearance) that skeletal muscle has. Also, smooth muscle is involuntary, meaning it is not under conscious control. For example, smooth muscle is found in the walls of internal organs like the intestines and blood vessels, and it functions without us having to think about it.

Answer:

B. unstriated and involuntary