Flashcards in Exam 1 Deck (78)
What anchors the AV valves and the semilunar valves?
What valves lie between the atria and ventricles?
Right - tricupid valve
Lepf- bicuspid or mitral valve
What valve lie between the aorta, pulmonary system and ventricles
What are the layers of the blood vessel wall?
endothelium and elastic lamina
smooth muscle and elastic lamina
What vasculature is distributive?
Elastic and muscular arteries
What vasculature is creates resistance?
What vasculature is for exchange
What are the capacitance vessels?
venules and veins
What layer is significant in elastic arteries and what is its effect?
Tunica media with a large amount of collagen and elastin
Windkessel effect- elastic reservoir expanding and recoiling over a cardiac cycle
What is the main layer on muscular arteries? What does it prevent?
Prevents kinking at joints
What is the main layer in arterioles? What controls this?
Tunica media (smooth muscle)
sympathetic nervous system and adrenoreceptors (b receptors)
Capillary walls are made of?
single layer of epithelium
What do venules lack?
What innervates veins? What is the effect of this innervation?
sympatheic nervous system
venoconstricion -> increased CVP -> increased cardiac output
beat per min
volume ejected per beat
volume ejected per min
systolic - diastolic
What is resistance
how hard it is for flow (Q) to occur through vessels
What is the major controlling factor of Q?
changes in resistance
What is the calculation for flow (Q)
Q= P / R
What is the equation for resistance (R)
R= 8vL / pi(r^4)
What has the largest effect on resistance
radius of the vessel (r^4)
The sum of all resistances in a series
Total peripheral resistance