Which body system is NOT a part of the excretory system?

Oxyntic (parietal) cells show the following EXCEPT:

Rationale: Parietal cells are rich in mitochondria for energy, not rER, which is more prominent in chief cells.

Chemical digestion of carbohydrates begins in the........... whereas chemical digestion of proteins begins in the...........

Rationale: Carbohydrate digestion starts in the oral cavity with salivary amylase, while protein digestion begins in the stomach with pepsin.

The hepatic flexure of the large intestine occurs between the:

Rationale: The hepatic flexure is located between the ascending colon and the transverse colon.

The cells of the proximal convoluted tubule contain a lot of mitochondria. Why?

A. Mitochondria produce the energy required for the passive transport of compounds across the membrane
B. Mitochondria produce the energy required for the diffusion of compounds across the membrane
C. Mitochondria produce the energy required for the pumping of compounds through the tubules
D. Mitochondria produce the energy required for the active transport of compounds across the membrane

Rationale: Mitochondria provide ATP for active transport of nutrients like glucose in the proximal convoluted tubule.

Glycogen is stored in-

Rationale: Glycogen is primarily stored in the liver.

Digestive System Multiple Choice Questions