Why the same hormone say epinephrine may cause different rea

Why the same hormone, say epinephrine, may cause different reactions from the target cells, for example, - smooth muscle cells? Because the reaction of the cell depends on the amount of the hormone. Because of the influence of environment on the cell, for example, - body temperature. Because cells have different receptor proteins, say, alpha- and beta- receptors. It depends on circumstances; sometimes cell reacts one way, sometimes - another. It depends on influence of other surrounding cells. Hormones that act on the same target cells yet have opposite effects are said to be: Synergists. Hydrophilic hormones. Antagonists. What is a major function of the endocrine system? The endocrine system communicates directly with target cells through the neurotransmitters. Endocrine system releases hormones into the bloodstream to reach receptors on target cells.  The endocrine system produces immediate, short-lasting effects. The endocrine system secretes products into ducts that lead to body surfaces or cavities.

Solution

9 . why do same homone say epinephrine may cause different reaction from the target cell

Because cells have different receptors proteins say alpha and beta receptors----answer

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10 Hormones that act on the same target cells you have opposite effects are said to be

Antagonists---answer

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11 what is a major function of the endocrine system

Endocrine system releases hormones into blood stream to reach receptors n the target cells---------answer

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Receptors

Two essential sorts of epinephrine receptors - called alpha and beta adrenergic receptors (adrenergic = for adrenaline). The two sorts are recognized (principally) by their relative affinities for epinephrine (adrenaline) and norepinephrine (noradrenaline).Two sorts of receptors initiate diverse G proteins and create distinctive second delivery people .

(1). Beta receptors G protein sort (Gs) cAMP reaction PKA

(2). Alpha1 receptors distinctive G protein (Gp) diverse second emissary (IP3) ties to receptors on ER film opens Ca++channels in ER Ca++ discharge from ER withdrawal

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