ATI RN
Questions About Digestive System Questions
Question 1 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 2 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.
Question 3 of 5
What are the advantages of chewing food at the start of digestion?
Correct Answer: D
Rationale: Chewing increases the surface area for enzyme action, lubricates food with saliva, and helps dissolve food particles.
Question 4 of 5
The muscular tube that extends from the mouth to the anus is called:
Correct Answer: D
Rationale: The alimentary canal, also known as the digestive tract, is the continuous muscular tube extending from the mouth to the anus, encompassing all digestive organs.
Question 5 of 5
The end product of digestion of starch which is absorbed into the bloodstream is:
Correct Answer: C
Rationale: Starch is broken down into glucose by enzymes like amylase and maltase, which is then absorbed into the bloodstream.