Intro Flashcards
What is the main purpose of the endocrine system?
To release hormones through a gland that will then enter the bloodstream to regulate body activities.
Briefly explain how hormones travel through the body:
-they get released from a gland and then travel through bloodstream and bind to receptors on target cells in order to produce a specific response
The endocrine system utilzes the _______, while the nervous system uses nerves.
Circulaotry system
What are the three different classifications of hormones?
-Amino Acid derivities
-Peptide hormone
-lipid derivites
What is the difference between an endocrine gland and an exocrine gland?
-An exocrine gland secretes substance that goes to a surface through a DUCT
-An endocrine gland does not have a duct and is just a group of cells that secrete hormones
Amino Acid Dervitites:
-Very small hormomnes that are structulaly related to AAs
-They CAN’T go into cells. They bind to the surface of cells which then causes a cascade events that produce a response inside the cell
-Examples: T3, T4, epinephrine, and norepinephrine
What system does the endocrine system work closely with….?
the nervous system!
Peptide hormones:
-small chains of AAs that are similar to AA derivative hormones but they are LARGER
-They CAN’T go into cells. They bind to the surface of cells which then causes a cascade events that produce a response inside the cell
-Examples: ADH, GH, prolactin, oxytocin, MSH, TSH, ACTH, LH, FSH, calicotonin, PTH, insuli, glucagon, and thymosins
What are the two types of lipid derivative hormones?
Steroids and Eicosanoids
What are steroids derived from? And what about Eicosanoids?
Steroids: Derived from cholesterol
Eicosanoids: Derived from arachidonic acid (20-C fatty acid)
Eicosanoids and steroids:
(lipid derivities)
-Bind to receptors INSIDE cell
-hormones enters cell, enters nucleus, binds with chromatin, activatesn DNA to make certain proteins
Examples: Androgens, estrogens, cortisol, and aldosterone
