The pancreas functions as both an exocrine and endocrine gland. Which hormone is secreted by the islets of Langerhans?
A. Pepsin
B. Insulin
C. Bile
D. Gastrin
Answer: Option B
Solution (By JKSSB Mock Tests)
The endocrine part of the pancreas—the islets of Langerhans—contains β-cells that secrete insulin (lowers blood glucose), α-cells secrete glucagon (raises blood glucose), and δ-cells secrete somatostatin. Exocrine pancreas secretes digestive enzymes (trypsin, lipase, amylase). Pepsin is from stomach, bile from liver, gastrin from stomach. Insulin deficiency causes diabetes mellitus.
Explanation:
Cytokinins are plant hormones that promote cytokinesis (cell division) and shoot initiation. They are used in tissue culture along with auxins to induce organogenesis. Auxins promote cell elongation and root initiation, gibberellins stem elongation, abscisic acid stress responses and dormancy.
Explanation:
The Calvin cycle fixes CO₂ into glucose, which is the primary organic product of photosynthesis. Oxygen is a byproduct of water splitting.
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