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15 Cards in this Set
- Front
- Back
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What is the Ejection Fraction?
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Volume of blood ejected during systole --> 0.67
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Who has an elevated Ejection Fraction?
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Athletes
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Who has a lowered Ejection Fraction
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Heart disease
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What happens to the S/D when you increase the heart rate?
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S: Lowers a lot
D: Lower a little bit |
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During the cardiac cycle what electrical event occur as you go from Diastole --> Systole?
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Ventricular Depolarization
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During the cardiac cycle what electrical event occur as you go from Systole --> Diastole?
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Ventricular Repolarization
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During the cardiac cycle what Acustical event occurs as you go from Diastole --> Systole?
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Lub of "Lub-Dub"
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During the cardiac cycle what Acustical event occurs as you go from Systole --> Diastole?
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Dub of "Lub-Dub"
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What is the order of flow in the capillaries?
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Arterioles --> Capillaries --> Venules
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Where is most of the blood volume (5L) contained in the CV system?
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Veins: 75% and adjustable (e.g change in posture)
Arteries: 20 % Capillaries: 5% or 1 cup |
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What are some special properties of Venis?
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1. Distensible: i.e stretchable
2. you can hold ALL the blood in veins 3. Low pH (lactic acid) 4. cooler (heat transfer in skin) |
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Why is the pressure in the arteries relatively constant (~100 mmHg) up until the arterioles?
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b/c the arteries are Large and have low resistance
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Why is the Cross-Sectional area the greatest and the Velocity of blood flow lowest t the capillaries?
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Allows for exchange via diffusion between blood and cells which requires time and a lot of surface area
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What are some special properties of the different compartments in the heart?
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Atria: thin walled, asymptomatic w/ arterial fibrillation, symptomatic @ high HR
Ventricles: Left is Thick and subject to higher pressures |
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Where are the valves located in the heart?
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Left: Mitral valve --> aortic valve
Right: Tricuspid valve --> pulmonary valve |
