The release of insulin from the pancreatic beta cells can inhibit its further release from the same cells. This is an example of which type of hormone action?
A) Retinoid
B) Autocrine
C) Juxtaposed
D) Arachidonic
Ans: B
Feedback:
Hormones can exert autocrine action on the cells from which they were produced. Retinoids are compounds with hormone-like actions. Juxtacrine action involves a chemical messenger imbedded in a plasma membrane that interacts with a specific receptor on a juxtaposed cell. Arachidonic acid is a precursor for eicosanoid compounds (similar to retinoids).
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