Nokea
Small amounts of electrolytes and nutrients - and most of the water-are absorbed by the
- A. Stomach.
- B. Duodenum.
- C. Jejunum.
- D. Colon and rectum.
Correct Answer: D
Rationale: The colon and rectum primarily absorb water and some electrolytes, finalizing the absorption process.
You may also like to solve these questions
Which of the following nutrients cannot be digested and retain their original chemical identities in the body?
- A. Vitamins
- B. Proteins
- C. Minerals
- D. Fats
- E. Simple carbohydrates
Correct Answer: C
Rationale: Minerals are not broken down during digestion and retain their chemical structure in the body.
For nutrients to be utilized, they must first be absorbed into the bloodstream from the GI tract. This is accomplished by uptake of the nutrients into the
- A. Arteries providing the GI tract with blood supply.
- B. Veins carrying deoxygenated blood away from the GI tract.
- C. Capillaries located in the intestinal wall villi.
- D. Vessels in the pylorus of the stomach.
Correct Answer: C
Rationale: Capillaries in the intestinal villi absorb nutrients, which are then transported to the bloodstream.
How can increasing the fiber intake in one's diet lead to a reduced caloric intake?
- A. Fiber promotes satiety, reducing overall food intake.
- B. Fiber binds to calories, preventing absorption.
- C. Fiber speeds up metabolism, burning more calories.
- D. Fiber replaces high-calorie foods in the diet.
Correct Answer: A
Rationale: Fiber increases feelings of fullness, leading to reduced food consumption and lower caloric intake.
Which two gender and age groups normally require more calories than the others?
- A. 2- to 3-year-old male
- B. 17-year-old female
- C. 15-year-old male
- D. 39-year-old female
- E. 63-year-old male
Correct Answer: B,C
Rationale: Teenagers, particularly males, have higher caloric needs due to rapid growth and higher metabolic rates during puberty.
Salivary amylase begins to break down
- A. Proteins.
- B. Fat.
- C. Simple carbohydrates.
- D. Complex carbohydrates.
Correct Answer: D
Rationale: Salivary amylase (ptyalin) breaks down complex carbohydrates like starches into simpler sugars in the mouth.