Insulin is secreted by the ________ cells in the islets of Langerhans of the pancreas
A) alpha
B) beta
C) gamma
D) delta
B
Explanation: A) Alpha cells secrete glucagon, not insulin.
B) Correct!
C) There is no such thing as gamma cells in the islets of Langerhans.
D) Delta cells secrete somatostatin, not insulin.
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