Nokea
Which enzyme helps break down fats in the digestive process?
- A. lipase
- B. pepsin
- C. papain
- D. amylase
Correct Answer: A
Rationale: Lipase is the enzyme responsible for breaking down fats into fatty acids and glycerol during digestion.
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About esophagus, all are true EXCEPT:
- A. Lined by st sq epith
- B. Glands are present mainly in submucosa
- C. Muscularis externa are formed entirely of smooth muscles.
- D. Muscularis mucosa is well developed in the lower half
Correct Answer: C
Rationale: The muscularis externa of the esophagus transitions from skeletal muscle (upper third) to smooth muscle (lower third), not entirely smooth muscle.
Endothelial cells of liver sinusoids, the following is true except:
- A. Lie on a discontinuous basal lamina
- B. Separated from hepatocytes by space of Disse
- C. The underlying space of Disse contain red blood cells
- D. The fenestra on its surface are collected at areas called sieve plates
Correct Answer: C
Rationale: The space of Disse contains plasma and microvilli, not red blood cells, which remain in the sinusoidal lumen.
The muscle that controls the entry of material into the small intestine from the stomach is the ____________________________ sphincter.
- A. anal
- B. cardiac
- C. pyloric
- D. intestinal
Correct Answer: C
Rationale: The pyloric sphincter regulates the passage of chyme from the stomach into the small intestine.
Urine leaves the body through a tube called
- A. the urethra
- B. the ureter
- C. the bladder
- D. the nephron
Correct Answer: A
Rationale: The urethra is the tube through which urine exits the body.
Simple sugar of blood is-
- A. Dextrin
- B. Lactose
- C. Sucrose
- D. Glucose
Correct Answer: D
Rationale: Glucose is the primary simple sugar circulating in the blood.