The stomach is an extremely hostile place. What protects it from digesting itself?
What will be an ideal response?
The mucus produced by its lining is protective and alkaline, so it prevents the hydrochloric acid from damaging the stomach. The lining cells actually make and release an inactive protein called pepsinogen rather than active pepsin directly. The cells of the stomach lining are rapidly replaced. Finally, gastric juices are normally released only when food is present, and the food will dilute the juices and reduce the chance of damage.
You might also like to view...
Imagine that you have the "stomach" flu. As you rush to the bathroom, describe the sequence of events and structures involved. ext Section: LO4 Key Concept: digestive tract Level: Application of concepts
What will be an ideal response?
A type III survivorship curve is characteristic of all
of the following EXCEPT a. flies. b. primates. c. frogs. d. sea stars. e. fish.
Aseptic packaging utilizes which of the following to sterilize laminated paper or plastic prior to filling with food?
A) hot HCl solution B) gamma radiation C) hot hydrogen peroxide solution D) X rays E) autoclave
Unlike primary villi, secondary villi have ____. Tertiary villi have that and ____.
A. Cytotrophoblasts; Mesoderm B. Capillaries; Spiral Arteries C. Mesoderm; Capillaries D. Syncytiotrophoblasts, Cytotrophoblasts E. Syncytiotrophoblasts, Spiral Arteries