Shared Flashcard Set

Details

Pressure Properties in Cardiovascular System
osmotic, ICOP,BOP,IHP,CHP etc.
81
Anatomy
Undergraduate 1
10/07/2012

Additional Anatomy Flashcards

 


 

Cards

Term
mean arterial pressure (MAP) def
Definition
pressure of moving blood through tissues
Term
mean arterial pressure formula
Definition
= diastolic + (1/3) pulse pressure
Term
mean arterial pressure depends on
Definition
metabolic (oxygen, nutrients) factors

myogenic factors (smooth muscle control)
Term
pulse pressure def
Definition
pressure systolic- pressure diastolic
Term
systolic pressure
Definition
peak arterial pressure in ventricular systole
Term
systolic pressure range and unit
Definition
100-120 mmHg
Term
diastolic pressure range and unit
Definition
60-80 mmHg
Term
diastolic pressure def
Definition
minimum arterial pressure during ventricular diastole
aorta valve close
Term
venous pressure def
Definition
amount of blood arriving at right atrium each minute
Term
Because venous BP is too low for venous return, how is it helped?
Definition
the respiratory pump
the muscular grp
layers of smooth muscle
Term
Averaged over a few heartbeats venous return is
Definition
equal to cardiac output
Term
when you inhale venous pressure (increased/decreased)
Definition
decreased
Term
osmotic pressure def
Definition
pressure that must be applied to prevent osmotic movement acossa membrane
Term
osmotic pressure increases when
Definition
solute concentration
increases
Term
blood colloid osmotic pressure (BCOP)
Definition
is the osmotic created pressure when suspended proteins are unable to capillary walls.
Term
BCOP average value
Definition
25 mmHg
Term
BCOP increases
Definition
increases when lg plasma proteins are outside capillary walls are increased
Term
interstitial colloid osmotic pressure value
Definition
zero
Term
net colloid osmotic pressure def
Definition
diff btwn:
blood colloid osmotic pressure
-
intersitial colloid osmotic pressure
Term
net colloid pressure formula
Definition
BCOP- ICOP
(25 -0)
Term
net osmotic pressures causes fluid to move in or out capillary
Definition
Fluid in capillary
Term
net colloid pressure causes fluid to move in or out of capillary
Definition
fluid in capillary
Term
hydrostatic pressure def
Definition
pressure created when something is moving through fluid.
Term
hydrostatic pressure causes fluid to move in or out capillary
Definition
fluid out of capillary
Term
capillary hydrostatic pressure (CHP) def
Definition
pressure within capillary beds
Term
interstitial hydrostatic pressure
(IHP) has a value of
Definition
zero
Term
net filtration pressure (NFP)
def
Definition
net hydrostatic pressure
-
net osmotic pressure
Term
NFP formula
Definition
=
(CHP-IHP) - (BCOP-ICOP)
Term
If the NFP is increased
Definition
blood hydrostatic pressure increased
decreased plasma albumin
Term
net CHP results in fluid loss/gain
Definition
loss of fluid out of capillary
Term
the venous system serves as a
Definition
blood resevoir
Term
large venous networks include
Definition
liver
bone marrow
skin
Term
circulatory pressure def
Definition
change of pressure across systemic unit
btwn the base of the ascending aorta and the entrance to the right atrium
Term
circulatory pressure average value
Definition
100 mmHg
Term
ciruclatory pressure must overcome
Definition
total peripheral resistance
Term
total peripheral resistance
Definition
resistance of entire of cardiovascular system
Term
total peripheral resistance depends on
Definition
vascular resistance
blood viscosity
turbulence
Term
turbulent blood flow is caused by
Definition
blood flowing from large to small vessel
atherosclerosis
Term
atherosclerosis and arterosclerosis affect what % of US
Definition
50
Term
resistance increases
Definition
as vessel diameter decreases
Term
a shorter blood vessel has
Definition
increased blood flow
Term
what is an aneruysm
Definition
buldge in arterial wall
Term
what causes an aneurysm
Definition
weak spot in elastic fibers
Term
an aneursym can eventually lead to
Definition
stroke
Term
if flow is doubled then blood pressure
Definition
doubled
Term
if flow is increased, resistance
Definition
decreased
Term
if flow is increased then what is increased, decreased
Definition
pressure, resistance
Term
if resistance is increased then then ---- is decreased
Definition
vessel radius to the 4th power
Term
high pulse pressure def
Definition
pressure consistently over 100 mmHg
Term
causes of high pulse pressure
Definition
atherosclerosis, excerise
which lead to heart disease
Term
low pulse pressure def
Definition
pressure less than 25% of systolic
Term
causes of low pulse pressure
Definition
drop in ventricular stroke volume
blood loss
congestive heart failure
shock
Term
arterial BP is an indicator of
Definition
how much the elastic arteries close to the heart can be stretched and the volume of blood mving through them.
Term
pulsastile pressure is created when
Definition
BP rises and falls
Term
histamine,kinins & prostaglandins are examples of __ which cause____
Definition
inflammatory chemicals; vasodilation
Term
if intravascular pressure is increased then smooth muscle __ which cause vessels to ___
Definition
stretch;vasoconstrict
Term
if intravascular pressure is decreased then smooth muscle__ which cause vessels to__
Definition
stretch less; vasodilate
Term
togther myogenic and metabolic effects fcn
Definition
maintain blood flow even if MAP changes
Term
list where pressure is highest to lowest
Definition
arteries
arterioles
capillaries
venules
vein
Term
orthostatic hypotension def and caused by
Definition
temp low BP due to overexcertion/inactivity
Term
materials move across capillary walls by
Definition
diffusion
filtration
reabsorption
Term
diffusion def
Definition
materials move from high to low concentration along a conc. gradient
Term
filtration def
Definition
hydrostatic pressure to move water and small solutes through a capillary wall
Term
reabsorption def
Definition
result of osmotic pressure
(fluid moves into capillary from intersitial fluid)
Term
water, ions,sm molecule such as glucise diffuse through
Definition
endothelial cells
or fenestrated capillaries
Term
some ions na,k+,ca2+, diffuse through?
Definition
ion channels in plasma membrane
Term
which capillaries allow free exchange?
Definition
sinusoidal
Term
large, water soluable compounds can diffuse through?
Definition
fenestrated capillaries
Term
lipids, lipid soluable materials such as O2 and CO2 diffuse through
Definition
endothelial plasma membranes
Term
plasma proteins diffuse through
Definition
endothethial lining in sinusoids
Term
the continial movement of fluid through interstial spaces produced by capillary fcn serves to
Definition
plasma + intersitial fluid are in communication & mutual exchange

. distrubution of nutrients,hormones, gases
. transport tissue protiens and insoluable lipids that cannot enter bloodstream by capillary walls
.carries bacs& toxins to lymphatic system
Term
fluid moves out of capillary & into interstital fluid at
Definition
arterial end of capillary
Term
fluid moves in capillary & out of interstial fluid at
Definition
venous end of capillary
Term
the venous end of a capillary is also the
Definition
transition pt btwn filtration & absorption
Term
do capillaries filter or absorb more
Definition
filter
Term
excess fluid which was filtered by capillaries go to
Definition
lymphatic vessels
Term
edema def
Definition
swelling of tissues with interstial fluid;
fluid out of blood to tissues
Term
causes for edema are
Definition
increased BCOP
increased capillary permabilty
high blood pressure
Term
shock def
Definition
any condition where blood vessels are not filled and/or blood cannot circulate normally
Term
blood flow through tissues is called
Definition
tissue perfusion
Term
tissue perfusion is affected by
Definition
cardiac output
peripheral resistance (dilation/constriction)
blood pressure
Supporting users have an ad free experience!