ATI RN
Digestive System Multiple Choice Questions Questions
Question 1 of 5
How many muscles does the action of swallowing use?
Correct Answer: D
Rationale: Swallowing involves approximately 29 muscles, including those in the pharynx and esophagus, coordinated by the autonomic nervous system.
Question 2 of 5
The secondary messenger is often:
Correct Answer: A
Rationale: cAMP is a common secondary messenger in hormone signaling pathways.
Question 3 of 5
The cells of the proximal convoluted tubule contain a lot of mitochondria. Why?
Correct Answer: D
Rationale: Mitochondria provide ATP for active transport of nutrients like glucose in the proximal convoluted tubule.
Question 4 of 5
The juxtaglomerular cells secrete what hormone?
Correct Answer: A
Rationale: Juxtaglomerular cells secrete renin to regulate blood pressure and filtration.
Question 5 of 5
Which of the following parts of the digestive system has the most important role in nutrient absorption?
Correct Answer: D
Rationale: The small intestine is the primary site for nutrient absorption due to its large surface area and specialized structures like villi and microvilli.