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12 Cards in this Set
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- Back
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How do you upregulate cardiac output?
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1. increase heart rate
2. increase stroke volume |
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How to increase stroke volume?
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1. Increase preload (Starling's law)
2. increase sympathetic stimulation 3. decrease arterial pressure |
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Aneurysm
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ruptured artery
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Ischemia
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restricted blood supply
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Infarction
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tissue death
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Poiseullie's equation
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Flow Q (mL/min) = pi(deltaP)r^4/8nl
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Resistance equation
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R = deltaP/Q = 8nl/pi r^4
turbulent flow ~ 1/r^5 |
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What muscle fibers do arteries contain that give it is elasticity?
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Elastin, collagen
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What two things do reduced vessel radius lead to?
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increased resistance, decreased arterial elasticity ==> both lead to high blood pressure
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What factors do arteries and arterioles respond to?
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Extrinsic, vasoconstricting
1. sympathetic nervous system 2. hormones (epinephrine, norinephrine) Intrinsic, vasodilating 3. local chemical factors (NO) that enhance blood flow |
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steady state
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aerobic metabolism increases energy production until this state, which is the amount of energy that the muscles require. aerobic metabolism won't go past this steady state - it won't produce more than the muscles demand.
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"the wall"
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when glycogen levels decrease and the body starts relying more on fat
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