Circulation Flashcards
______ vessels have 4X the cross sectional area than that of _____ vessels.
Venous, arterial
The progressive loss of pressure down to the 17 mmHg at the capillaries is important for what two things?
allowing perfusion
avoiding plasma leakage
Changes in surface area of vessels allows for what two things?
- equal circulation through the system
- efficient time in capillary for diffusion
True or False? CO is the sum of all tissue flow.
True
True or False? Arterial pressure is generally independent of local blood flow and CO.
True
What two things do blood flow depend on?
- pressure drop from arterial to venous circulation
Ohm’s Law states that flow is ______ proportional to pressure gradient and flow is ____ proportional to resistance.
directly, inversely
_____ flow is streamline.
Laminar
_____ flow is disorderly.
Turbulent
_____ is the measure of blood flow through a vessel at a given pressure.
Conductance
What three factors govern resistance?
- length of vessel
- radius of vessel
- blood viscosity
Poiseuille’s Law includes the influence of _____.
laminar flow
____ are the most significant regulator of systemic vascular resistance (SVR).
arterioles
Arteriole radius control SVR and therefore ______.
mean arterial pressure (MAP)
_____ is resistance in each vessel.
Series PVR (peripheral vascular resistance)
