ATI RN
Anatomy And Physiology Digestive System Test Questions Questions
Question 1 of 5
Which nerve is primarily responsible for the neural control of the gastric phase, including the stimulation of gastric secretions?
Correct Answer: B
Rationale: The vagus nerve (cranial nerve X) is the primary nerve responsible for parasympathetic control of the stomach, stimulating gastric secretions and motility during the gastric phase.
Question 2 of 5
During the process of defecation, which of the following changes takes place?
Correct Answer: A
Rationale: The internal anal sphincter relaxes reflexively during defecation to allow stool passage, while the external sphincter is voluntarily controlled.
Question 3 of 5
Why is pepsin not secreted into the stomach?
Correct Answer: B
Rationale: Pepsin is secreted into the stomach as pepsinogen by chief cells and activated by stomach acid. It does not digest the stomach due to the protective mucus layer.
Question 4 of 5
Lipase breaks down molecules of fat into what?
Correct Answer: B
Rationale: Lipase hydrolyzes triglycerides into fatty acids and glycerol, which are then absorbed.
Question 5 of 5
Homeostasis has 3 parts. What is the general term for the 1st?
Correct Answer: C
Rationale: Receptors detect changes in the internal environment as the first step in homeostasis.