Nokea
Amylase breaks down what macromolecule?
- A. Protein
- B. Fat
- C. DNA
- D. Starch
Correct Answer: D
Rationale: Amylase breaks down starch into simpler sugars like maltose.
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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.
Where is water mainly absorbed in the alimentary canal?
- A. Small intestine
- B. Stomach
- C. Large intestine
- D. Esophagus
Correct Answer: C
Rationale: The large intestine absorbs most of the remaining water from digested material, forming semi-solid feces.
Secretin and cholecystokinin are secreted in
- A. Pyloric region
- B. Ileum
- C. Duodenum
- D. Oesophagus
Correct Answer: C
Rationale: Secretin and cholecystokinin are secreted in the duodenum to regulate pancreatic and gallbladder activity.
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.
Fungiform papillae appear as red spots on tongue surface because:
- A. Secondary papillae are covered by the same epithelial cap
- B. Fungiform papillae have no taste buds.
- C. Covered by pseudostratified epith.
- D. Its connective tissue contains Von Ebner's glands
Correct Answer: A
Rationale: Fungiform papillae appear red due to their thin epithelium and rich vascularity in the connective tissue, not because of secondary papillae structure.