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

Thursday, December 14, 17

Endocrine System

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

Thursday, December 14, 17

Endocrine System

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

Thursday, December 14, 17

Endocrine System

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

Thursday, December 14, 17

Endocrine System

Classes of messengers1) Nervous: NT released at synapses.

Thursday, December 14, 17

Endocrine System

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

Thursday, December 14, 17

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.

Thursday, December 14, 17

Hormones

Hormones: Chemical messengers that help regulate cellular activity.

Thursday, December 14, 17

Hormones

Hormones: Chemical messengers that help regulate cellular activity.

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

Thursday, December 14, 17

Hormones

Hormones: Chemical messengers that help regulate cellular activity.

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

Thursday, December 14, 17

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

Thursday, December 14, 17

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.

Thursday, December 14, 17

Hormones

There are two main classes of hormones:

SteroidProtein

Thursday, December 14, 17

Steroid Hormone

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

Thursday, December 14, 17

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

Thursday, December 14, 17

Thursday, December 14, 17

Steroid Hormone Protein 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

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

Thursday, December 14, 17

Steroid Hormone Protein 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

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

Thursday, December 14, 17

Thursday, December 14, 17