Receptors are proteins located on the surface of cells that bind to specific substances, called ligands, and trigger responses in the cell. There are two main types of receptors: G protein-coupled receptors, which are the largest family and trigger intracellular responses through G proteins; and ion channel receptors, which directly open or close ion channels to influence the cell's electrical properties. Receptors play an important role in many physiological processes by allowing cells to respond to hormones, neurotransmitters, and other substances outside the cell.

1. Receptors
Presented by:
Andrea Long S.N., Carissa Matlock S.N., Matthew
Dellegar S.N.

9. ON

11. For Example….

12. We would give the patient
Dobutamine, a drug that
directly mirrors the effects of
norepinephrine , a chemical
made by the body.

17. OFF

24. References
agonist. (n.d.) The Free Dictionary By Farlex Online. Retrieved
from http://www.thefreedictionary.com/agonist
Antagonist. (n.d.) The Free Dictionary By Farlex Online.
Retrieved from
http://www.thefreedictionary.com/antagonist
(Aug. 21, 2012). Opiate Receptors. Retrieved from
http://www.opiates.com/opiates/opiate-receptors.html
Lehne. Pharmacology for Nursing Care, 8th Edition. W.B.
Saunders Company, 042012. <vbk:978-1-4377-3582-
6#outline(8.5.2)>.
Receptor (biochemistry). (n.d.) Retrieved Sept. 5, 2012 from
Wikipedia:
http://en.wikipedia.org/wiki/Receptor_(biochemistry)