NEET PG DENTAL EXAM

Detailed explanation-1: -Peptide hormones are soluble in plasma, act via surface receptors, are fast-acting and short-lived. Thyroid hormones and steroid hormones are insoluble in plasma, act via intracellular receptors to change transcription, are slow-acting and are long-lived.

Detailed explanation-2: -Hormonal responses are slower than the reflex actions because hormones, which initiate and control the responses, are chemicals transported by blood. On the other hand, in reflex actions, the impulses are electrical in nature and are transmitted by specialised cells called neurons that make up nervous tissue.

Detailed explanation-3: -Hormones bring about their characteristic effects on target cells by modifying cellular activity. Protein hormones react with receptors on the surface of the cell, and the sequence of events that results in hormone action is relatively rapid.