Nokea
How many nephrons are found in each kidney?
- A. approximately one hundred
- B. approximately one thousand
- C. approximately one million
- D. approximately ten million
Correct Answer: C
Rationale: Each kidney contains about one million nephrons, the functional units for filtration.
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What is the site of amino acids absorption in human's small intestine?
- A. Duodenum
- B. Jejunum
- C. Ileum
- D. Both (2) and (3)
Correct Answer: D
Rationale: Amino acids are absorbed mainly in the jejunum and ileum of the small intestine.
Which process matches the definition: The uptake of substances by the GI tract?
- A. Absorption
- B. Ingestion
- C. Peristalsis
- D. Assimilation
Correct Answer: A
Rationale: Absorption is the process by which nutrients are taken up from the GI tract into the bloodstream.
The terminal portion of the small intestine is the:
- A. ileum
- B. cecum
- C. duodenum
- D. jejunum
Correct Answer: A
Rationale: The ileum is the final section of the small intestine, connecting to the large intestine.
Which food substance is absorbed, without digestion?
- A. Carbohydrates
- B. Proteins
- C. Vitamins
- D. Fats
Correct Answer: C
Rationale: Vitamins are absorbed without digestion, unlike macronutrients.
Match each term with the correct description: waste liquid containing water, salts, and wastes
- A. urethra
- B. urinary system
- C. bladder
- D. urine
Correct Answer: D
Rationale: Urine is the waste liquid containing water, salts, and metabolic wastes.