Nokea
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.
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Which body system is NOT a part of the excretory system?
- A. respiratory system
- B. digestive system
- C. circulatory system
- D. urinary system
Correct Answer: C
Rationale: The circulatory system transports substances but is not directly part of excretion.
The diagram shows a section through a villus. Y X What is a function of structure X and of structure Y?
- A. X: to absorb amino acids, Y: to digest starch
- B. X: to carry blood, Y: to secrete mucus
- C. X: to transport fats, Y: to secrete enzymes
- D. X: to transport glucose, Y: to help peristalsis
Correct Answer: A
Rationale: Structure X (epithelial cells) absorbs amino acids, while structure Y (goblet cells) secretes mucus.
Match each term with the correct description: filtering units of kidney
- A. urethra
- B. nephrons
- C. bladder
- D. kidneys
Correct Answer: B
Rationale: Nephrons are the filtering units within the kidneys.
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.
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.