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Microcirculation
Microcirculation by Dr. Gibbons
30
Medical
Professional
10/04/2011

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Term
How does thermoregulation affect blood flow and MAP regulation?
Definition
Arterioles are the main resistors. The body's attempt to thermoregualte can cause problems in blood pressure. THe skin vessels dialate this decreases TPR, and CO. MAP cannot be maintained so the person collapse
Term
How does the sympathetic system effect venous circulation?
Definition
decreases compliance, which shifts the graph to the right and increases the blood going to the heart, vasoconstriction, increases MSP
Term
is the capillary bed under low or high pressure
Definition
low pressure
Term
the type of specialized microcirculation found in the kidneys that functions in forming urine and keeping in proteins and excreting waste
Definition
glomerulus
Term
In the interstitium what helps to hold the fliud betweenthe cells and the vessels?
Definition
proteins (collagen)
Term
the structures that suck up the extra fluid from the cells and dumps it into venous circulation
Definition
the lymphatic system
Term
how are gases and solutes mainly exchanged across the capillary walls
Definition
simple diffusion
Term
list lipid soluble and water soluble substances
Definition
 Lipid-soluble substances: O2 and CO2

 Water-soluble substances: water, glucose, amino acids
Term
The driving force of the fluid movement across capillary wall is due to the balance of hydrostatic and osmotic pressures
Definition
Starling Forces
Term
the sum of hydrostatic and effective
osmotic pressures drives the
Definition
net fluid movement
Term
effective osmotic pressure due to plasma proteins is called
Definition
oncotic pressure
Term
If onconotic pressure is higher what occurs and usually where
Definition
reabsorption (veins)
Term
If hydrostatic higher the fluid will
Definition
because the hydrostatic pressure is higher the pressure will build up in the vessels cause the fluid to leave the cell and filtration
Term
is there a suppose to be a net accumulation of fluid in the vessels
Definition
no
Term
is there a change in compliance during absorption of fluid in the veins
Definition
no there is no change in compliance because there is more proteins in the vessels
Term
if the net pressure in the capillaries is positive what will occur
Definition
filtration (fluid will leave the capillary)
Term
if the net pressure is negative
Definition
absorption (fluid will come into the capillary)
Term
the water permeability of the capillary wall that Determines the magnitude of the fluid movement for a given
pressure difference
Definition
hydraulic conduction
Term
where the lowest hysraulic conduction is found
Definition
cerebral capillaries
Term
where the highest hydraulic conduction is found
Definition
glomerular capillaries (high in filtration)
Term
arteriolar dialtion and venous constriction causes
Definition
an increase in capillary hydrostatic pressure
Term
arterior constriction due to hemorrhage cause
Definition
decrease in capillary hydrostatic pressure
Term
a loss in fluid but not protein (dehydration or diarrhea) causes
Definition
increase in the capillary oncotic pressure
Term
less concentrated plasma protein due toliver and renal diseases, infusion of saline instead
of plasma or whole blood for bleeding compensation
Definition
decrease in capillary oncotic pressure
Term
during respiratory ditress syndrome, the more negative thoracic pressure causes
Definition
there is a decrease in interstitial hydrostatic pressure which leads to an increase in filtration
Term
What causes edema
Definition
the volume if interstitial fluid is greater than the ability of the lymphatics to return to circulation due to increase filtration out of the capillaries
Term
What causes edema
Definition
the volume if interstitial fluid is greater than the ability of the lymphatics to return to circulation due to increase filtration out of the capillaries
Term
the sound of the lungs of someone with congestive heart failure
Definition
crackling sound in the lungs
Term
histamine changes what factor
Definition
it change the hydraulic conduction, water permeability
Term
cause of edema of kids with swollen stomach
Definition
they don't have enogh proteins, so not enough oncotic pressure, lose the ability to reabsorb fluids.
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