Endocrine_System

Endocrine_System - ENDOCRINE SYSTEM ENDOCRINE SYSTEM...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
ENDOCRINE SYSTEM
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ENDOCRINE SYSTEM COMPONENTS Endocrine organs with endocrine glands – thyroid, pineal etc Endocrine glands – ductless - produce hormones Hormones – 1. chemical messengers secreted into the bloodstream 2. stimulate response in target tissues or organs Target cells - have receptors for hormones
Background image of page 2
Endocrine Organs
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ENDOCRINE vs. EXOCRINE GLANDS Exocrine glands ducts carry secretion to body surface or other organ cavity affect extracellular activities - e.g. food digestion Endocrine glands ductless, release hormones into bloodstream intracellular effects, alter target cell metabolism
Background image of page 4
ENDOCRINE SYSTEM Works with nervous system to maintain: 1. Integration 2. Control
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
NERVOUS vs. ENDOCRINE SYSTEM Means of communication nervous system has both electrical and chemical methods endocrine system has only chemical methods Speed and persistence of response nervous system reacts quickly (1 - 10 msec) and stops quickly endocrine system usually reacts slowly Adaptation to long-term stimuli nervous system adapts quickly and response declines endocrine system has more persistent responses Area of effect nervous system effects are specific (one organ) endocrine system may have effects on many organs
Background image of page 6
NOTES Several chemicals function as both hormones and neurotransmitters – e.g. norepinephrine, dopamine and antidiuretic hormone Some hormones are secreted by nerve cells or neurons (neuroendocrine cells) oxytocin and catecholamines Nervous & endocrine systems have overlapping effects on the same target cells neurons trigger hormone secretion hormones stimulate or inhibit neurons
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
HYPOTHALAMUS Forms floor and walls of the third ventricle of brain Regulates many functions Produces hormones secreted by the pituitary gland
Background image of page 8
PITUITARY GLAND Suspended from hypothalamus by stalk (infundibulum) Located in sella turcica of sphenoid bone Controls other endocrine glands
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Pituitary Gland Anatomy
Background image of page 10
Tropic hormones target other endocrine glands 1. Gonadotropins target gonads a) FSH (follicle stimulating hormone) b) LH (luteinizing hormone) 2. TSH (thyroid stimulating hormone)
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 35

Endocrine_System - ENDOCRINE SYSTEM ENDOCRINE SYSTEM...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online