ATI LPN
Gastrointestinal System Quiz Questions Questions
Question 1 of 5
How does digested food finally reach the bloodstream?
Correct Answer: B
Rationale: Digested nutrients are absorbed into the bloodstream via blood vessels in the small intestine's villi, making B correct. The gullet doesn't absorb, lungs are respiratory, and large intestine absorbs water, not nutrients into blood.
Question 2 of 5
Blood glucose levels are lowered by insulin because it stimulates
Correct Answer: B
Rationale: Insulin promotes glucose uptake by cells, lowering blood levels, making B correct.
Question 3 of 5
What enzyme functions optimally at a pH of 7?
Correct Answer: D
Rationale: Trypsin functions best at neutral to basic pH (around 7-8) in the small intestine, making D correct.
Question 4 of 5
What two structures produce chemicals that digest proteins?
Correct Answer: C
Rationale: Gastric glands (pepsin) and pancreas (trypsin) digest proteins, making C correct.
Question 5 of 5
Which of the following is not a component of pancreatic juice?
Correct Answer: C
Rationale: Pancreatic juice contains enzymes and bicarbonate, not HCl (stomach), making C correct.