ATI RN
20 Questions About The Digestive System With Answers Questions
Question 1 of 5
Four test tubes, each containing 2cm3 of amylase solution are treated as follows: 1 boiled, then cooled to 1 °C 2 boiled, then cooled to 25 °C 3 frozen, then warmed to 1 °C 4 frozen, then warmed to 25 °C 10 cm3 of starch solution were then added to each tube and after 5 minutes, 2 drops of iodine solution were added to each tube. Which row shows the results?
Correct Answer: A
Rationale: Boiling denatures the enzyme permanently, while freezing does not affect its activity once thawed.
Question 2 of 5
Four bags made of partially permeable membrane are placed in tubes as shown in the diagram. bag made of partially permable membrane starch solution water reducing sugar solution water starch solution and saliva water tube 1 tube 2 tube 3 tube 4 saliva water After 20 minutes at 35 oC a sample of water from each tube, outside the bag, is boiled with Benedict's solution. What are the results?
Correct Answer: A
Rationale: Only reducing sugars can pass through the membrane, turning Benedict's solution red, while starch cannot.
Question 3 of 5
Blood from the intestines travels to the liver via the:
Correct Answer: D
Rationale: The hepatic portal vein carries nutrient-rich blood from the intestines to the liver for processing before it enters systemic circulation.
Question 4 of 5
Which process matches the definition: Rhythmic contraction and relaxation of smooth muscle that propel food along the digestive tract?
Correct Answer: B
Rationale: Peristalsis is the rhythmic muscular action that moves food through the digestive tract.
Question 5 of 5
What happens during the intestinal phase of digestion?
Correct Answer: B
Rationale: In the intestinal phase, chyme is mixed with pancreatic juice and bile, and nutrients are absorbed primarily in the small intestine.