GMS 6474 Module 10 WITH WELL ANSWERED QUESTIONS

GMS 6474 Module 10 WITH WELL |\ |\ |\ |\ |\ |\




ANSWERED QUESTIONS |\




Changes in blood pressure when you stand - CORRECT ANSWERS
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✔✔- Blood pools in your veins in your lower limbs when you stand,
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because of gravity and high venous compliance
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- reduces VR, CO, and MAP
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- Baro. fixes it by increasing HR, contractility and TPR
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Standing vessel pressure - CORRECT ANSWERS ✔✔- without
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compensation, blood pools in veins |\ |\ |\ |\




- with SNS stim, arterioles and venules constrict
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- during skeletal muscle contraction, all vessels constrict and blood is
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pushed back to the heart
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- shortly after contraction back flow of blood in veins is stopped by the
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valves


Standing for long periods of time - CORRECT ANSWERS ✔✔Increased
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venous pressure in LE|\ |\ |\




hydrostatic pressure increases in LE |\ |\ |\ |\




filtration increases in LE |\ |\ |\




venous blood volume decreases
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, CVP decreases and CO decreases
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Mechanisms to reduce venous pooling - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\ |\



✔✔Skeletal muscle pump |\ |\




Thoracic pump |\




- inspiration decreases intrathoracic pressure which decreases CVP and
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RAP, increases the driving pressure from LE to CV space and increases
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venous return |\




Exercise compensatory mechanisms - CORRECT ANSWERS ✔✔Blood
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flow to active muscles increase
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-increased SNS and local control |\ |\ |\ |\




active muscles extract more O2 from the blood
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Cardiac Cycle during exercise - CORRECT ANSWERS ✔✔- whole
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period is shortened by 200-400 ms
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- slow filling phase is shortned
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- SV increased
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|\ - increased VR and increased contractility (reduced ESV)
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- vent. and aortic pressures rise
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