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 main source of energy in food is
C. nucleic acids.
2. Bread that has been partially digested by saliva tends to have a sweet taste. Which enzyme and substrate are involved?
A. Pepsin and starch.
B.Pepsin and protein.
C. Amylase and starch.
D. Amylase and protein.
3. The digestion of starch is catalyzed by a polymer made up of
A. fatty acids.
C. amino acids.
4. In a demonstration, 10 grams of raw meat were suspended in an enzyme solution. After several hours the meat was weighed and was found to have a mass of 3 grams. The solution most likely contained
5. The role of bile during digestion is to
A. stimulate the release of glycogen.
B. hydrolyze neutral fats into fatty acids.
C. catalyze the breakdown of peptides into amino acids.
D. break fat into droplets thereby increasing surface area.
6. Abnormal liver function in humans affects the digestion of
7. Glucose levels in the blood are lowered by the hormone
D. cholecystokinin (CCK).
8. Which of the following enzymes is correctly matched with its substrate?
9. A piece of stomach wall is grafted into the skin of a mammal. The presence of food in the stomach causes this patch of stomach wall on the skin to produce gastric juices. This is evidence that the secretion of gastric juice is most likely brought about by
B. nervous stimulation.
C.the secretion of a hormone.
D. mechanical stimulation of the stomach wall
10. Which of the following is a function of insulin?
A. Initiating the ‘fight or flight’ response.
B. Decreasing glucose concentration in the blood.
C.Increasing the calcium ions concentration in the blood.
D. Decreasing the sodium ions concentration in the blood