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17 Cards in this Set
- Front
- Back
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Dicrotic Notch
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brief rise in arterial pressure from the blood bouncing off the closed semilunar valves
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thrombus
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a clot in an unbroken vessel
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embolus
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a thrombus that breaks away from the vessel wall and floats freely in the blood stream
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angina pectoris
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chest pain due to lack of blood and therefore oxygen supply to the heart muscle due to obstruction or spasm of the coronary arteries
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bainbridge reflex
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the increase HR action that occurs when receptors in the SA node and stretch receptors in the atria detect and increase in venous pressure
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Mary's Law
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a reflex action that causes a decrease in HR when there is an increase in BP
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pulse pressure
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PP=systol-diastol
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effect of thyroxine on the heart
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increases contractility
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Congestive heart failure
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a condition that can result from any structural or functional cardiac disorder that impairs the ability of the heart to fill with or pump a sufficient amount of blood to the body
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what is the average cardiac ouput?
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5250ml
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What is the breakdown of blood in the body?
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55% plasma, 45% erythrocytes, 1%leukocytes and platelets
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what is the composition of plasma?
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90% water, 10% solute
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what is the composition of solute?
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made up of many proteins (60% albumin, globulin, fibrogen)
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steps in erythropoiesis
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1.hemocytoblast
2.proerythroblast 3. early erythroblast 4. late erythroblast 5. normblast 6. reticulocyte 7. erythrocyte |
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mechanisms of erythropoiesis in response to hypoxia
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1. imbalance decreases the amount of oxygen in the blood
2. this causes the kidneys to produce erythropoietin 3. erythropoietin cause the red bone marrow to produce more red blood cells 4. the increase in RBCs increases the amount of oxygen |
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what are negative cronotropic factors
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factors that decrease HR
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what are positive cronotropic factors
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factors that increase HR
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