NEET BIOLOGY

Detailed explanation-1: -The movement of food in the alimentary canal or the contraction and relaxation of blood vessels are involuntary movements. We cannot start or stop them. Smooth muscles or involuntary muscles control such movements.

Detailed explanation-2: -Examples of uncontrollable movements are: Loss of muscle tone (flaccidity) Slow, twisting, or continued movements (chorea, athetosis, or dystonia) Sudden jerking movements (myoclonus, ballismus)

Detailed explanation-3: -Food moves through your GI tract by a process called peristalsis. The large, hollow organs of your GI tract contain a layer of muscle that enables their walls to move. The movement pushes food and liquid through your GI tract and mixes the contents within each organ.

Detailed explanation-4: -Peristalsis is the automatic wave-like movement of the muscles that line your gastrointestinal tract. Peristalsis moves food through your digestive system, beginning in your throat when you swallow and continuing through your esophagus, stomach and intestines while you digest.

Detailed explanation-5: -The wall of alimentary canal contains muscle layers. Rhythmic contraction and relaxation of these muscles push the food forward. This is called peristalsis, which occurs all along the gut.