Nokea
Function of HCl in stomach is to-
- A. Kill micro-organism of food
- B. Facilitate absorption of food
- C. Dissolve hormones secreted by gastric glands
- D. Active trypsinogen to trypsin
Correct Answer: A
Rationale: HCl kills microorganisms in food, aiding in sterilization.
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Pancreatic acinar cells, the following is true except:
- A. Contain basal basophilic striations
- B. Have receptors for cholecystokinin (secreted by enteroendocrine cells in intestine)
- C. Have receptors for cholecystokinin acetyl choline (for autonomic control)
- D. Secrete pepsinogen enzyme for protein digestion
Correct Answer: D
Rationale: Pancreatic acinar cells secrete digestive enzymes like amylase and lipase, not pepsinogen, which is from gastric chief cells.
Where are the Islets of Langerhans found?
- A. Pancreas.
- B. Ileum.
- C. Colon.
- D. Liver.
Correct Answer: A
Rationale: The Islets of Langerhans are clusters of cells in the pancreas responsible for producing hormones like insulin and glucagon.
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.
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.
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.