GMS 6474 Module 10 WITH WELL |\ |\ |\ |\ |\ |\
ANSWERED QUESTIONS |\
Changes in blood pressure when you stand - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔- Blood pools in your veins in your lower limbs when you stand,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
because of gravity and high venous compliance
|\ |\ |\ |\ |\ |\
- reduces VR, CO, and MAP
|\ |\ |\ |\ |\
- Baro. fixes it by increasing HR, contractility and TPR
|\ |\ |\ |\ |\ |\ |\ |\ |\
Standing vessel pressure - CORRECT ANSWERS ✔✔- without
|\ |\ |\ |\ |\ |\ |\ |\
compensation, blood pools in veins |\ |\ |\ |\
- with SNS stim, arterioles and venules constrict
|\ |\ |\ |\ |\ |\ |\
- during skeletal muscle contraction, all vessels constrict and blood is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pushed back to the heart
|\ |\ |\ |\
- shortly after contraction back flow of blood in veins is stopped by the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
valves
Standing for long periods of time - CORRECT ANSWERS ✔✔Increased
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
venous pressure in LE|\ |\ |\
hydrostatic pressure increases in LE |\ |\ |\ |\
filtration increases in LE |\ |\ |\
venous blood volume decreases
|\ |\ |\
, CVP decreases and CO decreases
|\ |\ |\ |\
Mechanisms to reduce venous pooling - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\ |\
✔✔Skeletal muscle pump |\ |\
Thoracic pump |\
- inspiration decreases intrathoracic pressure which decreases CVP and
|\ |\ |\ |\ |\ |\ |\ |\
RAP, increases the driving pressure from LE to CV space and increases
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
venous return |\
Exercise compensatory mechanisms - CORRECT ANSWERS ✔✔Blood
|\ |\ |\ |\ |\ |\ |\
flow to active muscles increase
|\ |\ |\ |\
-increased SNS and local control |\ |\ |\ |\
active muscles extract more O2 from the blood
|\ |\ |\ |\ |\ |\ |\
Cardiac Cycle during exercise - CORRECT ANSWERS ✔✔- whole
|\ |\ |\ |\ |\ |\ |\ |\ |\
period is shortened by 200-400 ms
|\ |\ |\ |\ |\
- slow filling phase is shortned
|\ |\ |\ |\ |\
- SV increased
|\ |\
|\ - increased VR and increased contractility (reduced ESV)
|\ |\ |\ |\ |\ |\ |\
- vent. and aortic pressures rise
|\ |\ |\ |\ |\
ANSWERED QUESTIONS |\
Changes in blood pressure when you stand - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔- Blood pools in your veins in your lower limbs when you stand,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
because of gravity and high venous compliance
|\ |\ |\ |\ |\ |\
- reduces VR, CO, and MAP
|\ |\ |\ |\ |\
- Baro. fixes it by increasing HR, contractility and TPR
|\ |\ |\ |\ |\ |\ |\ |\ |\
Standing vessel pressure - CORRECT ANSWERS ✔✔- without
|\ |\ |\ |\ |\ |\ |\ |\
compensation, blood pools in veins |\ |\ |\ |\
- with SNS stim, arterioles and venules constrict
|\ |\ |\ |\ |\ |\ |\
- during skeletal muscle contraction, all vessels constrict and blood is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pushed back to the heart
|\ |\ |\ |\
- shortly after contraction back flow of blood in veins is stopped by the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
valves
Standing for long periods of time - CORRECT ANSWERS ✔✔Increased
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
venous pressure in LE|\ |\ |\
hydrostatic pressure increases in LE |\ |\ |\ |\
filtration increases in LE |\ |\ |\
venous blood volume decreases
|\ |\ |\
, CVP decreases and CO decreases
|\ |\ |\ |\
Mechanisms to reduce venous pooling - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\ |\
✔✔Skeletal muscle pump |\ |\
Thoracic pump |\
- inspiration decreases intrathoracic pressure which decreases CVP and
|\ |\ |\ |\ |\ |\ |\ |\
RAP, increases the driving pressure from LE to CV space and increases
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
venous return |\
Exercise compensatory mechanisms - CORRECT ANSWERS ✔✔Blood
|\ |\ |\ |\ |\ |\ |\
flow to active muscles increase
|\ |\ |\ |\
-increased SNS and local control |\ |\ |\ |\
active muscles extract more O2 from the blood
|\ |\ |\ |\ |\ |\ |\
Cardiac Cycle during exercise - CORRECT ANSWERS ✔✔- whole
|\ |\ |\ |\ |\ |\ |\ |\ |\
period is shortened by 200-400 ms
|\ |\ |\ |\ |\
- slow filling phase is shortned
|\ |\ |\ |\ |\
- SV increased
|\ |\
|\ - increased VR and increased contractility (reduced ESV)
|\ |\ |\ |\ |\ |\ |\
- vent. and aortic pressures rise
|\ |\ |\ |\ |\
