NEET BIOLOGY

Detailed explanation-1: -Smooth muscle, neither striated in structure nor under voluntary control, is found within the walls of organs and structures such as the oesophagus, stomach, intestines, bronchi, uterus, urethra, bladder, etc.

Detailed explanation-2: -Smooth muscle fibers are located in walls of hollow visceral organs (such as the liver, pancreas, and intestines), except the heart, appear spindle-shaped, and are also under involuntary control. Skeletal muscle fibers occur in muscles which are attached to the skeleton.

Detailed explanation-3: -Smooth muscle consists of thick and thin filaments that are not arranged into sarcomeres giving it a non-striated pattern. On microscopic examination, it will appear homogenous. Smooth muscle cytoplasm contains a large amount of actin and myosin. Actin and myosin act as the main proteins involved in muscle contraction.

Detailed explanation-4: -Smooth muscle is a type of tissue found in the walls of hollow organs, such as the intestines, uterus and stomach. You can also find smooth muscle in the walls of passageways, including arteries and veins of de cardiovascular system.

Detailed explanation-5: -Smooth muscle is a type of muscle tissue. Unlike the other two types of muscle tissue, skeletal and cardiac muscle tissue, smooth muscle does not have striations. Smooth muscle is found in the walls of hollow organs like the digestive tract, blood vessels, bronchioles, urinary bladder, and uterus.