How many salivary glands are found in a man?

Which of the following is a common passage in swallowing food and breathing-

Rationale: The pharynx serves as a common pathway for both food (to the esophagus) and air (to the larynx).

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.

Food and chyme are pushed through the digestive system by:

Rationale: Peristalsis refers to the rhythmic contractions of smooth muscle that propel food and chyme through the digestive tract.

Besides carbohydrates, proteins, fats, vitamins and minerals, what other nutrient does your body need for life?

Rationale: Water is an essential nutrient required for all bodily functions.

The juxtaglomerular cells secrete what hormone?

Rationale: Juxtaglomerular cells secrete renin to regulate blood pressure and filtration.

Digestive System Multiple Choice Questions