ATI RN
Digestive System Practice Questions Questions
Question 1 of 5
Match: Carbohydrate
Correct Answer: A
Rationale: Carbohydrates serve as the body's primary energy source and consist of carbon, hydrogen, and oxygen atoms.
Question 2 of 5
A digestive enzyme, salivary amylase, in the saliva begin digestion of-
Correct Answer: A
Rationale: Salivary amylase (ptyalin) in saliva begins the digestion of carbohydrates by breaking down starches into simpler sugars like maltose.
Question 3 of 5
Which features make a villus well adapted for absorbing amino acids from the ileum?
Correct Answer: B
Rationale: Villi have a large surface area to volume ratio, good blood supply, and thin walls, facilitating efficient absorption of nutrients such as amino acids.
Question 4 of 5
Which listed substances are all broken down by the liver?
Correct Answer: D
Rationale: The liver metabolizes various substances including urea, alcohol, and drugs.
Question 5 of 5
Which element in the molecule of urea shows that it is formed from amino acids and not from glucose?
Correct Answer: C
Rationale: Nitrogen is a key component of amino acids and is retained in urea during deamination.