Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Pharm Ch 25
Drugs for Hypertension Key Terms
| Term | Definition |
|---|---|
| aldosterone | hormone secreted by the adrenal cortex that increase sodium reabsorption in the distal tubule of the kidney |
| angiotensin II | chemical released in response to falling blood pressure that causes vasoconstriction and release of aldosterone |
| angiotensin-converting enzyme (ACE) | enzyme responsible for converting angiotensin I to angiotensin II |
| antidiuretic hormone (ADH) | potent vasoconstrictor that can also increase blood pressure by raising blood volume |
| baroreceptors | nerves located in the walls of the atria, aortic arch, vena cava, and carotid sinus that sense changes in blood pressure |
| calcium channel blockers (CCBs) | drug that blocks the flow of calcium ions into myocardial cells |
| cardiac output | the volume of blood pumped per minute |
| chemoreceptors | nerves located in the aortic arch and carotid sinus that sense changes in oxygen content, pH, or carbon dioxide levels in the blood |
| diuretics | substance that increases urine output |
| hypertension (HTN) | the consistent elevation of systemic arterial blood pressure |
| peripheral resistance | amount of friction encountered by blood as it travels through the vessels |
| primary hypertension | HTN having no identifiable cause |
| reflex tachycardia | temporary increase in heart rate that occurs when blood pressure falls |
| renin-angiotensin-aldosterone system (RAAS) | body mechanism for raising blood pressure initiated by the release of renin by the kidney |
| secondary hypertension | HTN that has a specific cause |
| stroke volume | amount of blood pumped out by a ventricle in a single beat |
| vasomotor center | area of the medulla that controls baseline blood pressure |
| alpha 2 agonists | decrease sympathetic impulses from the CNS to the heart and arterioles, causing vasodilation |
| alpha1 blockers | inhibit sympathetic activation in arterioles, causing vasodilation |
| direct vasodilators | act on the smooth muscle of arterioles, causing vasodilation |
| beta blockers | decrease the heart rate and myocardial contractility, reducing cardiac output |
| calcium channel blockers | block calcium ion channels in arterial smooth muscle, causing vasodilation |
| angiotensin receptor blockers | prevent angiotensin II from reaching its receptors, causing vasodilation |
| diuretics | increase urine output and decrease fluid volume |
| ACE inhibitors | block formation of angiotensin II, causing vasodilation, and block aldosterone secretion, decreasing fluid volume |
Created by:
NursingStudyStack
Popular Pharmacology sets