Physiology of digestion -Basic Level
Dear Readers,
Compared to other sections, Zoology is considered to be the most scoring section. If prepared thoroughly, Zoology can help students to secure a position in the exam. These questions are very important in achieving your success in Exams after 12th.
Q1. Mechanical stimulation of villi by the food produces a hormone which is known as
Enterocrinin is a hormone secreted by the duodenum mucosa and is stimulated by hydrogen ions which stimulates the intestinal glands to increase succus entericus juice.
Q2. During digestion the lymphatics of the intestine become filled with fat globules which give white colour to the lymph. This lymph is known as [CMC Vellore 1993]
Chyle is a milky bodily fluid consisting of lymph and emulsified fats, or free fatty acids. It is formed in the small intestine during digestion of fatty food, and taken up by lymph vessels specifically known as lacteals.
Q3. Some of the free fatty acids and monoacyl glycerols aggregate in ileum to form the water soluble substance for the absorption. This is known as
Fatty acids and glycerol being insoluble, cannot be absorbed into the blood.
Q4. Which of the following are reabsorbed in the alimentary canal as such [DPMT 1986]
Monoglycerides and fatty acids enter absorptive cells in the small intestine through micelles; they leave micelles and recombine into chylomicrons, which then enter the bloodstream.
Q5. Trypsin differs from pepsin in that [CPMT 1982; DPMT 1982]
Pepsin is secreted in the stomach, whereas trypsin is a component of pancreatic juice. ... Trypsin and chymotrypsin are endopeptidase type of enzymes and are active in alkaline pH i.e., 7.5 to 8.
Q6. Some proteolytic enzymes are [CPMT 1977]
The three main proteolytic enzymes produced naturally in your digestive system are pepsin, trypsin and chymotrypsin.
Q7. The enzymes have proteinous and prosthetic groups connected by loose bonds. Under activity the loose bonds are separated. It is known as [CPMT 1977]
No Explaination
Q8. The simplest form of food elements carbohydrates, proteins, fats are present in which part of alimentary canal
Carbohydrates, proteins, and fats are digested in the intestine, where they are broken down into their basic units: Carbohydrates into sugars. Proteins into amino acids. Fats into fatty acids and glycerol.
Q9. Which of the following enzyme is not secreted by wall of alimentary canal
It is a muscular tube that moves the partially digested food from mouth to stomach for further digestion.
Q10. Pepsin is secreted in the form of pepsinogen. It is activated by the…..in the stomach
Pepsin is expressed as a zymogen called pepsinogen, whose primary structure has an additional 44 amino acids compared to the active enzyme.
