Final answer:
Smooth muscle tissue has no striations and is arranged in sheets, contributing to functions like controlling blood flow and pressure, and operates under involuntary control. correct opttion is c.
Step-by-step explanation:
The type of muscle tissue that has no striations is smooth muscle. Unlike skeletal and cardiac muscles, which have a striped or striated appearance due to their arrangement in bundles or sarcomeres, smooth muscle cells are arranged in sheets and lack this banded look.
Therefore, options a (cardiac), b (skeletal), and d (fibrous) are incorrect, as those muscle tissues do exhibit striations. Smooth muscle tissue is involved in various functions such as affecting the flow of blood and blood pressure and is controlled involuntarily by the autonomic nervous system.
Smooth muscle tissue lacks striations, which are the alternating dark and light bands observed in skeletal and cardiac muscles. Smooth muscle is found in the walls of internal organs, blood vessels, and other structures. Unlike skeletal and cardiac muscles, smooth muscle cells are spindle-shaped and have a single nucleus.
The absence of striations in smooth muscle is due to the arrangement of actin and myosin filaments, which are not organized into the highly structured sarcomeres seen in striated muscles. This lack of striations contributes to the smooth, involuntary, and sustained contractions characteristic of smooth muscle tissue.