Nokea
(Gustatory) sensory cells of taste buds, all true except:
- A. They have pale cytoplasm and darkly stained oval nuclei.
- B. Their apical surfaces contain long microvilli embedded in amorphous glycosaminoglycan material secreted by supporting cells
- C. Are peripheral in position
- D. Their basal parts are connected to the afferent nerve fibers.
Correct Answer: C
Rationale: Gustatory cells are centrally located within the taste bud, surrounded by supporting cells, not peripheral.
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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 pylorus is best described as the:
- A. Area of the stomach that accepts food from the esophagus
- B. Valve between the ileum and the cecum
- C. Terminal portion of the large intestine
- D. Area of the stomach that empties into the small intestine
Correct Answer: D
Rationale: The pylorus is the lower part of the stomach that connects to the duodenum.
How many pairs of salivary glands produce saliva, which contains amylase to start digestion of dietary starch?
- A. Two
- B. Three
- C. Four
- D. Five
Correct Answer: B
Rationale: Humans have three pairs of salivary glands (parotid, submandibular, sublingual) that produce saliva containing amylase; not five as originally asserted.
Which of the given enzymes is responsible for the digestion of milk protein?
- A. Erepsin
- B. Trypsin
- C. Pepsin
- D. Rennin
Correct Answer: D
Rationale: Rennin is responsible for the digestion of milk protein. Rennin is present in the human body in its inactive form called prorenin. When we consume milk, it reacts with the hydrochloric acid present in the stomach. Hydrochloric acid activates the inert prorenin and converts it into active Rennin.
Mucus is secreted by the :-
- A. Stomach
- B. Duodenum
- C. Large intestine
- D. All of the above
Correct Answer: D
Rationale: Mucus is secreted by the stomach, duodenum, and large intestine for protection and lubrication.