Tag: digestive system - organs

The correct answer is (b).

In each set of teeth, incisors (I) are indicated first, canines (C) second, premolars (P) third, and finally molars (M), giving I:C:P:M which is the minimum number of teeth in one half of one jaw. 

There is only one set of teeth functional throughout life with the exception of a milk molar which is replaced by the last premolar. Incisors are more numerous than in placentals. 3 premolars and 4 molars as against 4 P and 3 M in placentals. Dentition in opossum is I 5/4, C 1/1, P 3/3, M 4/4. 

The uvula is a fleshy extension that hangs from the back of the soft palate.

During swallowing, the soft palate and uvula move upward to close off the nasopharynx, preventing food from entering the internal nares.

• Proteins are converted into dipeptides in the stomach which is followed by the conversion of dipeptides to amino acids in the small intestine. These amino acids are absorbed through the wall of the intestine as simple absorbable substances.
• Hence In order to absorb and use Proteins by the body, these must be broken down by hydrolysis into proteins.
• So, the correct answer is 'amino acids, proteins'.

Protein in invertebrates is a breakdown by four different enzymes known as a proteinase, carboxypolypeptidase, aminopolypeptidase, and dipeptidase, which can be separated by adsorption but vertebrates have one extra enzyme trypsin is also found that helps in activation of the given four and digestion of protein.

Amylase, rennin and trypsin are protein enzymes.

Pancreatic amylase is an enzyme secreted by the pancreas into the small intestine that specifically breaks down complex carbohydrates like starch into simpler sugars.

Lipase is a specialized digestive enzyme secreted primarily by the pancreas and in small amounts in the mouth and stomach. Its primary biological function is to catalyze the breakdown of dietary fats (lipids) into glycerol and fatty acids.