Nokea
CAVEOLATED CELLS all true except:
- A. Rare cells in gastric & intestinal mucosa may be chemoreceptor
- B. Their microvilli are long twice the length of those nearby cells
- C. Apical cell membrane shows deep tubular invaginations (Caveolae).
- D. Important cell for mucosal regeneration
Correct Answer: D
Rationale: Caveolated (tuft) cells are sensory, not regenerative; stem cells handle mucosal regeneration.
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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.
A carbohydrate splitting enzyme is secreted by -
- A. Liver
- B. Zymogen cells of gastric glands
- C. Spleen
- D. Crypts of Lieberkuhn
Correct Answer: D
Rationale: Crypts of Lieberkuhn secrete enzymes like maltase that split carbohydrates.
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.
Micelle formation is necessary for the intestinal absorption of
- A. Galactose
- B. Vitamin B12
- C. Vitamin D
- D. Bile salts
Correct Answer: C
Rationale: Micelles, formed by bile salts, facilitate the absorption of fat-soluble vitamins like vitamin D in the small intestine.
Peyer's patches produce-
- A. Enterokinase
- B. Lymphocyte
- C. Mucous
- D. Trypsin
Correct Answer: B
Rationale: Peyer's patches in the small intestine produce lymphocytes, which are part of the immune system.