Which muscle tissue lacks striations and is found in hollow organs?

Study for the Ivy Tech APHY 101 Muscle System Test. Dive into comprehensive questions with clear hints and explanations, boosting your confidence for the exam!

Multiple Choice

Which muscle tissue lacks striations and is found in hollow organs?

Explanation:
Smooth muscle tissue lacks striations and lines the walls of hollow organs such as the stomach, intestines, bladder, and blood vessels. Its fibers are spindle-shaped and arranged in layers, allowing slow, continuous contractions that move contents along or regulate organ diameter. These contractions are involuntary and driven by the autonomic nervous system. In contrast, skeletal muscle has clear banding (striations) and is under voluntary control, while cardiac muscle also shows striations and is limited to the heart with specialized intercellular connections. Nervous tissue isn’t muscle at all.

Smooth muscle tissue lacks striations and lines the walls of hollow organs such as the stomach, intestines, bladder, and blood vessels. Its fibers are spindle-shaped and arranged in layers, allowing slow, continuous contractions that move contents along or regulate organ diameter. These contractions are involuntary and driven by the autonomic nervous system. In contrast, skeletal muscle has clear banding (striations) and is under voluntary control, while cardiac muscle also shows striations and is limited to the heart with specialized intercellular connections. Nervous tissue isn’t muscle at all.

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