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Flashcards in Hemodynamics Deck (36)
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31

What is sheer stress proportional to?

The viscosity and the sheer rate (rate at which the axial velocity changes from the wall to the lumen) and the flow rate

32

What is sheer stress inversely proportional to?

cube of the vessel radius

33

In a blood vessel, which area has the minimal frictional retardation and maximal velocity?

the axial layer

34

Is sheer stress involved in endotheliam cell signalling and the development of atherosclerosis?

Yes

35

True or False:

Anything that changes the velocity will lead to stress and sheer

True

36

In constriction of an artery, what type of pressure decreases and what type of pressure increases?

Lateral pressure decreases and dynamic pressure increases.

This is because whenever blood velocity increases, a greater proportion of the blood pressure is converted from lateral into dynamic pressure