Chapter 21 Blood Vessels And Hemodynamics Flashcards
Capillaries
Allow the exchanges of substances between the blood and body tissues
Arteries
Carry blood away from the heart
Veins
Carry blood back to the heart
The walls of the capillary has only what type of lining
A tunica interna which allows quick exchange of nutrients and gases
The average blood pressure in veins is
Lower than in arteries and capillaries
The difference in blood osmotic pressure across a capillary wall is due to
The presence of plasma proteins in blood
What is blood pressure
Contraction of the ventricals. The hydrostatic pressure exerted by blood on the wall of a blood vessel. Is determined by cardiac output, blood volume and vascular resistance
Systolic blood pressure has what kind of arterial pressure during systole
Highest
Diastolic blood pressure has what kind of arterial pressure during systole
Lowest
Blood pressure is determined by three factors
Cardiac output, blood volume, and vascular resistance
An increase in blood pressure is caused by an increase in
Cardiac output, blood volume and systemic vascular resistance
Systemic vascular resistance is also called
Total peripheral resistance
What causes vasodilation
Histamine
What causes vasoconstriction
Serotonin
What is a pulse
It is the alternate expansion and elastic recoil of an artery wall with each heartbeat
