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Chapter 36 Endocrine
Endocrine
4
Biology
Undergraduate 1
03/25/2009
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Term
Exocrine?
Endocrine?
Paracrine?
 Definition
-Releases chemical through a duct (to outside of body or inside of tube).
-Releases hormones, ductless
-Chemical released that acts at a neighboring cell.EX: neurotransmitter @ synapse.
Term
Hormone?
Neurotransmitter?
Pheromone?
 Definition
-Released in the blood stream and acts at a target receptors.
-are secreted from neurons and act only in synaptic cleft between axon endings and target cells.
-Chemicals that are released and picked up by olfactory.
Term
What is a hormone? types?
 Definition
A hormone is released in the blood stream and acts at a target receptor. The first type is Amino Acid Type (peptide), some examples are: Dopamine, Norepinaphrian, Epinephrina, which are all hydrophillic(charged/polar). Also they are extracellular receptors. The second type is steroids, examples are: testosterone,estrogen,progestrone, cortisol, cholestrol, these are all lipophillic(fat soluble). Also the they are intracellular, the receptors is on the inside.
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