Nokea
All about Striated ducts is true EXCEPT:
- A. Are ion transporting cells
- B. Present in all salivary glands
- C. Present in exocrine portion of pancreas
- D. Show basal acidophilic striations.
Correct Answer: C
Rationale: Striated ducts are found in salivary glands, not the exocrine pancreas, which has intercalated ducts instead.
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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.
Negative feedback can be described as...?
- A. As the concentration of the product increases it inhibits stimulation and consequently decreases product synthesis
- B. As the concentration of the product decreases it decreases stimulation and consequently further decreases product synthesis
- C. Product concentration has no effect on stimulation - another control mechanism is put in place to change rate of production
- D. As the concentration of the product increases it increases stimulation and consequently further increases product synthesis
Correct Answer: A
Rationale: Negative feedback reduces the stimulus as the product accumulates, maintaining homeostasis.
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.
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.
Which organ is retroperitoneal?
- A. liver
- B. ileum
- C. stomach
- D. pancreas
Correct Answer: D
Rationale: The pancreas is a retroperitoneal organ, located behind the peritoneum.