Nokea
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.
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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.
On average what is the normal intake of water?
- A. 3200 cm^3
- B. 2300 cm^3
- C. 1300 cm^3
- D. 5000 cm^3
Correct Answer: B
Rationale: Average daily water intake is about 2300 cm³ (2.3 liters), including food and drink.
Match: Canines
- A. teeth used to grind meat
- B. teeth for tearing food
- C. teeth for crushing
- D. teeth for cutting
Correct Answer: B
Rationale: Canines are pointed teeth designed for tearing food, especially meat.
Large, insoluble molecules have to be digested before they can be
- A. absorbed.
- B. assimilated.
- C. egested.
- D. ingested.
Correct Answer: A
Rationale: Large molecules must be broken down into smaller, soluble units before they can be absorbed across the intestinal lining.
Which division of the Enteric Nervous System is most likely to be stimulated by a pH change in the chyme?
- A. Submucosal Plexus (Meissner plexus)
- B. Myenteric Plexus (Auerbach Plexus)
- C. Both
- D. Neither
Correct Answer: A
Rationale: The submucosal plexus regulates secretions and senses luminal pH changes, responding to chyme acidity.