endocrine system - ms. kropac

Endocrine SystemAn Overview

Thursday, December 14, 17

Endocrine SystemThere are two ways to maintains homeostasis

Directly: Using specific responses, nervous systemIndirectly: Using a general response, chemicals released over a large area


Endocrine System

Three steps in chemical communication1) Synthesis of the hormone at he gland.


Endocrine System

Three steps in chemical communication1) Synthesis of the hormone at he gland.2) Release of the hormone.


Endocrine System

Three steps in chemical communication1) Synthesis of the hormone at he gland.2) Release of the hormone.3) A cellular response.


Endocrine System

Classes of messengers1) Nervous: NT released at synapses.


Endocrine System

Classes of messengers1) Nervous: NT released at synapses.2) Endocrine: Chemicals released by endocrine cells.


Endocrine SystemClasses of messengers1) Nervous: NT released at synapses.2) Endocrine: Chemicals released by endocrine cells.3) Intra-cellular: work inside the cell, secondary messengers.


Hormones

Hormones: Chemical messengers that help regulate cellular activity.


Hormones


Produced in one part of the body and act on cells in another.


Hormones


Produced in one part of the body and act on cells in another.Secreted in small amounts


HormonesHormones: Chemical messengers that help regulate cellular activity.

Produced in one part of the body and act on cells in another.Secreted in small amountslong-lasting, slow-acting


HormonesHormones: Chemical messengers that help regulate cellular activity.

Are released by the endocrine system, travel via bloodstream.A cell must have a receptor for a hormone to be impacted by it.


Hormones

There are two main classes of hormones:

SteroidProtein


Steroid Hormone

-Made from cholesterol-Fat Soluble-Diffuses from cell produced


Steroid Hormone

-Made from cholesterol-Fat Soluble-Diffuses from cell produced-Receptor in cytoplasm, moves into nucleus to interact with gene(leads to transcription)-Ex/ Sex Hormones


Steroid Hormone Protein Hormone


-Chain of amino acids-Water Soluble-Released from cell produced


Steroid Hormone Protein Hormone


-Chain of amino acids-Water Soluble-Released from cell produced-Receptor activates secondary messenger complex (cAMP), activates enzymes-Ex/ Insulin, Growth Hormone


endocrine system - ms. kropac

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