Capillaries
This type of capillary located in the skin
Continuous
What vessel has the largest diameter
elastic artery
What is cardiac output a measurement of?
Blood volume per minute
Define Preloading
amount of stretch at the end of diastole
EKG measures what?
Electrical activity of the heart
What are fenestrations?
Small perforations within the capillary
What is Blood Flow driven by
Pressure Gradient
What is the equation for stroke volume
End diastolic - end systolic
Contractility is defined as what
Difference in contractile force at same amount of stretch
Can the heart beat without the SA node
Yes
What type of capillary allows large proteins to move through membranes?
Sinusoidal
The way the body controls MAP short term
Baroreceptor reflex
what is the relationship between stroke volume and contraction force
direct relationship
Bulk flow
Movement of H2O and solutes caused by pressure gradient
Junctional rhythm
SA node is nonfunctional
What moves through simple diffusion in capillaries?
O2, CO2, and lipids
Arteriole diameter is controlled by the release of ?
Norepinephrine
What is the frank starling law?
relationship between stroke volume and end diastolic volume
define viscosity and what could cause blood to become more viscous
What happens if the AV node fails to conduct impulses
Second degree heart block
What causes precapillary sphincters to close?
Buildup of metabolic waste
What is shunting?
Blood is bypassed allowing it to flow through the body faster
What are the variables that determine EDV
Skeletal muscle pump, constriction of veins, and respiratory pump
What are the neurological components used to control SV, HR, and CO
vagus nerve and cardiac sympathetic nerves
what happens when the electrical activity of the heart is disorganized
ventricular fibrillation