ATI RN
Questions About Digestive System Questions
Question 1 of 5
Which of the following is not a function of saliva?
Correct Answer: A
Rationale: Saliva does not aid in protein digestion; it primarily helps in moistening food, contains amylase for carbohydrate digestion, and facilitates chemical digestion.
Question 2 of 5
Match: Lipid
Correct Answer: A
Rationale: Lipids, or triglycerides, consist of three fatty acids attached to a glycerol molecule and provide energy storage.
Question 3 of 5
Which juice secreted by the organs in the alimentary canal plays an important role in the digestion of fats?
Correct Answer: C
Rationale: Bile juice, secreted by the liver, plays an important role in the digestion of fats by emulsifying them. It does not contain enzymes but helps break down fat molecules into smaller droplets for further digestion.
Question 4 of 5
In human body, the digestion of protein begins in which of the following organs?
Correct Answer: D
Rationale: The digestion of protein begins in the stomach, where pepsin, activated by hydrochloric acid, starts breaking down proteins into smaller peptides.
Question 5 of 5
An investigation is carried out on digestion and absorption in the alimentary canal. The diagram shows the apparatus used. The visking tubing is permeable to small molecules such as glucose but not to large molecules such as starch. beaker water starch solution and amylase visking tubing glass rod to support visking tubing After one hour, samples of water in the beaker are tested with Benedict's solution and with iodine solution. Which colours are obtained?
Correct Answer: D
Rationale: Starch is broken down to glucose, which passes through the visking tubing, giving a positive Benedict's test (red), while iodine remains negative as starch cannot pass through.