Lecture 17: Gravitational Effects On Circulation Flashcards
1
Q
When fluid flows against a resistance energy is ________________________.
A
Lost as heat
2
Q
Blood doesn’t flow down a ________ gradient but an _________ gradient
A
Pressure
Energy
3
Q
1mmHg = _____ mmH2O
A
13.6mmH2O
4
Q
What is the formula for hydrostatic pressure?
A
P = ρgΔh
5
Q
The pressure generated is proportional to the left ventricular ___________.
A
Thickness
6
Q
Why does blood pool in veins?
A
They are compliant and it’s in response to elevated hydrostatic pressure
7
Q
What do negative g-forces cause?
A
Red-out - blood rushes to head (broken capillaries in the eyes)
8
Q
What do positive g-forces cause?
A
Blackout - blood rushes to the feet (loss of flow to the head)
