The type of muscle present in the alimentary canal is A) Smooth muscle fibers B) Striped muscle Fibers C) Cardiac muscle fibers D) Both A and B
Hint: Muscle tissue is characterized by its ability to move. Muscle cells that are excitable respond to a stimulus. They're contractile, which means they can shorten and create a pulling power. When attached between two movable things, such as two bones, muscle contraction causes the bones to move. Any muscle movement is voluntary, implying that it is strongly regulated.
Complete answer: Option A: Smooth muscle fibers or cells have a spindle structure and are elongated. Each fiber contains a single oval nucleus. The cytoplasm known as sarcoplasm surrounds this nucleus. In the cytoplasm, myofibrils are arranged longitudinally. Peristalsis is the primary feature of these muscle fibers. It occurs in the tubular viscera. Smooth muscle fibers are found in the wall of the alimentary canal for this purpose. The function of these muscles is regulated by the autonomic nervous system. As a result, they are not subject to the animal's will. Layers of smooth muscle line the walls of the alimentary canal, which are regulated by the autonomic nervous system. Percussion is the contraction and relaxation of these muscles in a cycle. So, option A is correct. Option B: The repeating bands of the proteins actin and myosin that run the length of myofibrils give skeletal muscle tissue its striated look. So, option B is incorrect. Option C: Cardiac muscle is a type of striated muscle found only in the heart. Cardiac muscle fibers are branched and have a single nucleus. So, option C is incorrect. Option D: Only smooth muscles are present in the alimentary canal. So, option D is incorrect.
Hence, Option A is the correct answer.
Note: Muscle tissue is divided into three types: 1. Skeletal Muscle Tissue: This kind of muscle tissue is present between the bones. It is made up of wrapped-together coils of muscle fibers. They aid in maintaining posture, controlling internal motions, and so on. 2. Cardiac Muscle Tissue: The heart contains cardiac muscle tissue. In the heart, it forms a deeply branched network. Intercalated discs attach the heart muscle to the rest of the body. It is responsible for the synchronized contractions that cause our heart to pump blood. 3. Smooth Muscle: This kind of muscle is made up of spindle-shaped cells and is involuntary. It is a non-striated, non-enucleate muscle. It's embedded in the walls of empty organs like the stomach and intestines.