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Multiple Choice
Which statement correctly describes cardiac muscle tissue?
A
Cardiac muscle is nonstriated and involuntary, found in the walls of hollow organs such as the intestines.
B
Cardiac muscle is striated and involuntary, found in the walls of the heart.
C
Cardiac muscle is striated and voluntary, attached to bones by tendons.
D
Cardiac muscle is nonstriated and voluntary, found primarily in the skin.
Verified step by step guidance
1
Step 1: Understand the characteristics of muscle tissue types. There are three main types: skeletal, cardiac, and smooth muscle, each with distinct features.
Step 2: Recall that cardiac muscle tissue is found exclusively in the heart walls, where it functions to pump blood throughout the body.
Step 3: Identify that cardiac muscle is striated, meaning it has a banded appearance under a microscope due to organized sarcomeres, similar to skeletal muscle.
Step 4: Recognize that cardiac muscle is involuntary, meaning it contracts without conscious control, unlike skeletal muscle which is voluntary.
Step 5: Use this information to evaluate the statements and select the one that correctly describes cardiac muscle as striated, involuntary, and located in the heart walls.