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33 Cards in this Set
- Front
- Back
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INOTROPY
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FORCE OF CONTRACTION
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DROMOTROPY
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SPEED OF CONDUCTION
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CHRONOTROPY
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HEART RATE
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Autonomic Nervous System
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A part of the nervous system which, is not under voluntary control. Composed of sympathetic and parasympathetic branches. Sympathetic stimulation results in increased heart rate and cardiac contractility. Parasympathetic stimulation of vagus nerve results in lower heart rate
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Sequence of blood flow thru vessels
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Heart to Arteries to arterioles to capillaries to venules to vein back to heart
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Arteries-
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The walls (outer structure) contain smooth muscle fibre that contract and relax under the instructions of the sympathetic nervous system.
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Arteries-
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Transport oxygenated blood away from the heart
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Arterioles-
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tiny branches of arteries that lead to capillaries. These are also under the control of the sympathetic nervous system
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Arterioles-
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Transport blood from arteries to capillaries and are the main regulators of blood flow and pressure.
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Capillaries
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tiny blood vessels, exist in most of the organs and tissues, supplied with blood from arterioles and drained by venules.
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Capillaries-
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Exchange of oxygen, carbon dioxide, water, salts, etc., between the blood and the surrounding body tissues.
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Venules
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Drain blood from capillaries into veins, for return to the heart
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Veins
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Transport blood towards the heart;Transport deoxygenated blood only (except in the case of the pulmonary vein).
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The innermost layer of an artery is
called? |
intima
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What are the cells that cover the muscle inside the artery?-
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endothelial
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The best way to change the pressure in a vessel ?
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Change the diameter or
radius |
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What kind of vessel is a vein?-
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Capacitance
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Coronary Sinus vein is located?
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Between the left atrium and left ventricle in the AV groove. The CS OS is located in the posterior wall of the right atrium.
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The Coronary Sinus
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Returns deoxygenated blood directly into the right atrium via the CS os
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How does the body control BP?
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Baroreceptors in aortic Arch (stretch receptors)
Carotids have the most efficient baroreceptors |
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Kidney contain what hormone that effects BP?
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Renin
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Liver Contains what hormone that effects BP?
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Angiotensin
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Beta 1 receptors are located where?
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Heart
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Stimulation of
beta 1 receptors does what? |
Increases heart rate and force of contraction.
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Beta 2 receptors are located?
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In the lungs, vascular smooth muscle, liver. Stimulation causes relaxation.
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Alpha receptors are located?
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smooth muscles of arterioles, liver . stimulation causes contraction of smooth muscle
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Pericardium
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protective sac surrounding the heart
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What is the normal amout of fluid in the pericardium?
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15 to 50ml
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Endocardium
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The innermost layer of heart
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Myocardium
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the thick middle layer of the heart
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If the pressure in the lungs does not drop to 7-12mmhg what will happen to the RBC's?
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They will not pick up oxygen
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Sympathetic stimulation results in?
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Results in increased heart rate and cardiac contractility
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Parasympathetic stimulation of the vagus nerve results ?
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lower heart rate and blood pressure
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