Microcirculation

Question 1

function as pressure reservoirs; direct blood to diff areas of body, from heart into pulmonary trunk and aorta; low-resistance vessels; blood press changes very little

Answer 1

arteries

Question 2

high resistance vessels; regulate resistance within the circuits; regulate blood flow to the organs

Answer 2

arterioles

Question 3

volume reservoirs; majority of blood is located here

Answer 3

venules and veins

Question 4

located in almost all tissues; just wide enough to accommodate a red blood cell; sites of exchange bw the blood plasma and the ISF

Answer 4

capillaries

Question 5

capillaries consist of a single layer of cells called

Answer 5

endothelial cells

Question 6

endothelial cells produce what? (thin; forms the outer surface of capillary)

Answer 6

basal lamina

Question 7

penetrate the capillary wall; water-filled; go between endothelial cells

Answer 7

intercellular clefts

Question 8

what can cross freely through the capillary wall?

Answer 8

O2 CO2 and water

Question 9

can proteins and plasma proteins cross the capillary wall?

Answer 9

proteins and restricted; plasma proteins cannot

Question 10

capillaries within what organ are very permeable?

Answer 10

liver

Question 11

capillaries within what organ are impermeable?

Answer 11

brain

Question 12

fluid movement across capillary walls is driven by

Answer 12

starling forces

Question 13

create pressure differences across capillary wall, fluid flows from high to low pressure

Answer 13

starling forces

Question 14

movement down a pressure gradient

Answer 14

bulk flow

Question 15

movement of fluid from plasma to ISF

Answer 15

filtration

Question 16

movement of fluid from ISF to plasma

Answer 16

absorption

Question 17

what are the two starling forces?

Answer 17

hydrostatic and osmotic pressure

Question 18

pressure exerted by a fluid on the capillary wall; push force

Answer 18

hydrostatic pressure (P)

Question 19

push fluid from plasma to ISF, promoting filtration

Answer 19

plasma hydrostatic pressure (Pc)

Question 20

push fluid from ISF to plasma, promoting absorption

Answer 20

ISF hydrostatic pressure (Pi)

Question 21

pressure that draws water from one compartment to another, pull force

Answer 21

osmotic pressure

Question 22

pressure that pulls fluid from ISF to plasma, promoting absorption

Answer 22

plasma osmotic pressure

Question 23

pulls fluid from plasma to ISF, promoting filtration

Answer 23

ISF osmotic pressure

Question 24

2 forces that promote absorption (hydro press of ISF and osmo press of plasma)

Answer 24

absorption pressure

Question 25

2 forces that promote filtration (hydro press of plasma and osmo press of ISF)

Answer 25

filtration pressure

Question 26

net direction of fluid movement

Answer 26

net filtration pressure (NFP)

Question 27

if NFP is positive, then there will be net....

Answer 27

net filtration

Question 28

if NFP is negative, then there will be net....

Answer 28

net absorption

Question 29

what is the only pressure value that varies depending on capillary length?

Answer 29

plasma hydrostatic pressure

Question 30

which pressure is greatest towards the end of the capillary?

Answer 30

absorption press

Question 31

loss of plasma results in accumulation of fluid where?

Answer 31

in the ISF; edema