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A&P 2 Lecture Notes - 1/22

by: Juliana Bernard

A&P 2 Lecture Notes - 1/22 272

Marketplace > University of Massachusetts > Kinesiology > 272 > A P 2 Lecture Notes 1 22
Juliana Bernard
GPA 4.0
Anatomy and Physiology II
Dr. Gordon

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About this Document

Endocrine system lecture notes from class on Thursday, January 22nd.
Anatomy and Physiology II
Dr. Gordon
One Day of Notes
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This 1 page One Day of Notes was uploaded by Juliana Bernard on Friday January 30, 2015. The One Day of Notes belongs to 272 at University of Massachusetts taught by Dr. Gordon in Spring2015. Since its upload, it has received 141 views. For similar materials see Anatomy and Physiology II in Kinesiology at University of Massachusetts.


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Date Created: 01/30/15
Thursday January 22 2015 KIN 272 Lecture Notes Endocrine System The endocrine system interacts with the nervous system to coordinate and integrate the activity of body cells Hormones are to the endocrine system as neurotransmitters are to the nervous system ES relies on 3 types of communication 1 Direct Communication hormones travel through gap junctions gap junction tunnellike protein channel in cell membranes that allows for communication between adjacent cells connected by tube like structures called connexons that connect the communication speed Exceedingly rare because in order for this communication to work the gland releasing the hormone and the tissue receiving the hormone have to be right next to each other 2 Paracrine Communication uses chemical messengers to transfer ions allowing several tissues to function all at the same time Uses extracellular fluid meaning hormones are released into extracellular fluid and then proteins or ions carry those hormones to different locations engaging multiple tissues in the same activities Also not as common as endocrine communication 3 Endocrine Communication hormones travel in the blood Most common pathway for hormones to travel through This is why most hormones don39t act as quickly as neurotransmitters neurotransmitters go from neuron to neuron acting quickly hormones are released from target glands travel into the blood to be taken where they need to go then need to be taken out of the blood through diffusion go to some target location need to get into the tissue bind to receptors if threshold stimulus is met then a response can be made hormone action takes much longer because of the steps that need to be takenquot unlike neurotransmitters which simply go from pre to cleft to postsynaptic 3 structures of hormones based on what they are made out of 1 Amino acid structurally related to proteins folded because they have larger number of amino acids ncude catacholamines epinephrine norepinephrine dopamine epinephrine excitatory norepinephrine can be excitatory or inhibitory based on target tissue dopamine can be excitatory or inhibitory based on target tissue Derivatives of tyrosine and tryptophan melatonin tryptophan derivative made by the brain and sets your biological clock released in response to darklight cycle of the earth thyroid hormones T1 T2 tyrosine derivatives of tyrosine responsible for metabolic control 2 Peptide hormones long chain amino acids do not make folded3D structure Often stored as inactive hormones in bits and pieceschunks of amino acid chains Never storedsaved as full hormone lnclude glycoproteins GH FSH LH Made on demand 3 Lipid derivatives Eicosanoids fat derivatives of arachidonic acid paracrine in nature used during injury or disease ex prostaglandin Steroid hormones formed from cholesterol LDL HDL assist with formation of sex hormones


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