Nokea
A set of permanent teeth contains:
- A. 20 teeth
- B. 30 teeth
- C. 32 teeth
- D. 24 teeth
Correct Answer: C
Rationale: An adult human has 32 permanent teeth.
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During swallowing food is prevented from being pushed up into the nasal cavity by:
- A. Hard palate
- B. Epiglottis
- C. Soft palate
- D. Tongue
Correct Answer: C
Rationale: The soft palate elevates during swallowing to close off the nasopharynx, preventing food from entering the nasal cavity. The epiglottis prevents entry into the trachea.
Which process is stimulated by adrenaline in the cells of the liver?
- A. breakdown of glycogen, increasing the blood glucose level
- B. breakdown of excess amino acids, forming urea
- C. breakdown of proteins, releasing amino acids into the blood
- D. conversion of excess blood glucose to glycogen
Correct Answer: A
Rationale: Adrenaline stimulates glycogenolysis in the liver, breaking down glycogen into glucose to increase blood glucose levels.
The food mixes thoroughly with acidic gastric juice of the by the churning movement-
- A. Rectum
- B. Duodenum
- C. Stomach
- D. Oesophagus
Correct Answer: C
Rationale: The stomach churns food with gastric juice to form chyme.
Which of these is not a carbohydrate?
- A. sugar
- B. starch
- C. fat
- D. cellulose
Correct Answer: C
Rationale: Fat is a lipid, not a carbohydrate, unlike sugar, starch, and cellulose.
Which of the following structures is a common passageway for both food and air?
- A. Nasopharynx
- B. Oropharynx
- C. Esophagus
- D. Trachea
Correct Answer: B
Rationale: The oropharynx serves as a common pathway for food (to the esophagus) and air (to the laryngopharynx and trachea), unlike the other options.