A is the answer to this problem
Building blocks of cell membranes, insulation, cell communication, energy storage, protection
The answer is D. All of the above.. I just took the test (:
Human gestation time is 40 weeks or 280 days
Answer:
Peristalsis is the involuntary movement of the muscles that move food through the digestive system.
Explanation:
- Peristalsis is a reflex response.
- It is initiated when the gut wall is stretched by the contents of the lumen.
- Peristalsis occurs in all parts of the gastrointestinal tract from esophagus to the rectum.
- It actually refers to the ringlike contraction of the circular smooth muscle that move progressively forward pushing the bolus.
- It involves coordinated contraction and relaxation above and below the food bolus so that the bolus is pushed forward instead of being pushed back.
