The human digestive system is a complex process that consists of breaking down large organic masses into smaller particles that the body can use as fuel. The breakdown of the nutrients requires the coordination of several enzymes secreted from specialized cells within the mouth, stomach, intestines, and liver. The major organs or structures that coordinate digestion within the human body include the mouth, esophagus, stomach, small and large intestine, and liver.
Here few questions to test your Knowledge in Digestive system
1. The purpose of physical digestion is to
A. hydrolyze large molecules.
B. increase the amount of feces.
C. increase the surface area of food.
D.slow the action of digestive enzymes.
2.How does digested food finally reach the bloodstream?
A.It passes through the gullet into the blood.
B.It is absorbed into the blood through blood vessels.
C.It is absorbed into the blood through the walls of the lungs.
D.It passes from the small intestine into the large intestine, then into the blood.
3. Which of the following structures prevents food from entering the trachea?
D. Cardiac sphincter.
4. The part of the digestive tract where starch first undergoes chemical digestion is the
C. large intestine.
D. small intestine.
5. Saliva contains an enzyme that partially digests
D. nucleic acids.
6. Eating which of the following would slow the rate of chemical digestion in the mouth?
B. Ice cream.
C. Potato chips.
D. Bread with butter.
7. Which of the following is required to convert pepsinogen into pepsin?
A. Mucus secretions.
B. Hydrochloric acid.
C. Sodium bicarbonate.
D.Lipid in the stomach.
8. A role of hydrochloric acid in the stomach is to
A. kill bacteria.
B. hydrolyze fat.
C. digest protein.
D. activate trypsin.
9. Sodium bicarbonate ( NaHCO3 ) in pancreatic juice
A. emulsifies fats.
B. activates pepsin.
C. neutralizes acid chyme.
D. stimulates the release of insulin.
10. Which of the following would inhibit trypsin’s ability to form an enzyme-substrate complex?
A. pH of 3.
B. Temperature of 3___C.
C. Increased bile production.
D. Decreased numbers of villi.