Nokea
The juxtaglomerular cells secrete what hormone?
- A. Renin
- B. ADH
- C. Angiotensin
- D. Adrenalin
Correct Answer: A
Rationale: Juxtaglomerular cells secrete renin to regulate blood pressure and filtration.
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Chemical digestion of carbohydrates begins in the........... whereas chemical digestion of proteins begins in the...........
- A. Oral cavity; duodenum
- B. Stomach; oral cavity
- C. Stomach; duodenum
- D. Oral cavity; Stomach
Correct Answer: D
Rationale: Carbohydrate digestion starts in the oral cavity with salivary amylase, while protein digestion begins in the stomach with pepsin.
A dysfunction of the parietal cells of gastric glands would result in a decreased production of which two of the following?
- A. mucus
- B. pepsinogen
- C. hydrochloric acid
- D. pepsin
Correct Answer: C
Rationale: Parietal cells secrete hydrochloric acid and intrinsic factor.
Nutrients like calcium and zinc are often referred to as
- A. proteins
- B. minerals
- C. fats
- D. vitamins
Correct Answer: B
Rationale: Calcium and zinc are classified as minerals, essential inorganic nutrients.
How many salivary glands are found in a man?
- A. 5 Pairs.
- B. 2 Pairs.
- C. 4 Pairs.
- D. 3 Pairs.
Correct Answer: D
Rationale: Humans have three pairs of major salivary glands: parotid, submandibular, and sublingual.
Lamina propria of hard palate is formed by:
- A. Loose areolar connective tissue.
- B. Adipose tissue
- C. Periostium of the bone above
- D. Mucoid connective tissue.
Correct Answer: C
Rationale: The lamina propria of the hard palate is directly continuous with the periosteum of the underlying bone, providing a firm attachment. Loose areolar tissue is more typical in softer mucosal areas.