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Bio 145 > Chapter 20 Capillary Beds > Flashcards

Chapter 20 Capillary Beds Flashcards

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Biology 101 flashcards
1
Q

vessels branching from meta arterial that make up the bulk of the capillary bed

A

true capillaries

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2
Q

a capillary bed or group of capillaries function together are fed by a?

A

metarteriole

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3
Q

proximal part of a capillary bed are encircled by scattered?

A

smooth muscle cells

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4
Q

distal part of the capillary bed, thoroughfare channel has no?

A

smooth muscle cells

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5
Q

__________ __________ connect to postcapillary venules, draining bed

A

thoroughfare channel

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6
Q

the proximal end of the thoroughfare channel is called the?

A

metarteriole

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7
Q

________ __________ make up the bulk of the capillary bed

A

true capillaries

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8
Q

smooth muscle ring at capillary origin, relaxes to permit blood to flow to True capillaries, contrax causing blood to bypass capillary bed

A

precapillary sphincter

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9
Q

_______: cycle of Contracting and relaxing of precapillary sphincters, at anytime 1/4 of bodies capillary beds are open

A

vasomotion

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10
Q

amount of light entering capillaries per unit time per gram of tissue?

A

( mL/min/gram) perfusion

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11
Q

________ are companion vessels with arterioles

A

venules

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12
Q

small and medium-sized veins are companion vessels with?

A

muscular arteries

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13
Q

largest veins are companion vessels with?

A

elastic arteries

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14
Q

most large veins have numerous valves to prevent?

A

blood from pooling in the limbs, and sure flow toward heart

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15
Q

what percentage of the blood is in systemic circulation?

A

70%

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16
Q

what percentage of the blood is in the heart at any given time?

A

12%

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17
Q

what percentage of the blood is in pulmonary circulation at any given time?

A

18%

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18
Q

A trashed majority of the blood in the body is in__________ _______ and function as blood reservoirs

A

systemic veins

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19
Q

55% of the blood is in?

A

systemic veins

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20
Q

5% of the blood is in?

A

systemic capillaries

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21
Q

10% of the blood is in?

A

systemic arteries

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22
Q

blood can be moved from veins into circulation via______________ and blood can be shifted back into reservoir as via ____________

A

vasoconstriction and vasodilation

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23
Q

blood can be moved from veins into circulation via vasoconstriction of veins when more blood is needed during _________

A

exertion

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24
Q

blood can be shifted back into reservoir is Vaya Vaso dilation when less blood needed during _____

A

rest

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25
Q

regulate blood flow through capillary beds?

A

precapillary sphincters

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26
Q

what are three different forms of capillaries from least permeable to most permeable?

A

continuous capillaries, fenestrated capillaries, sinusoid capillaries

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27
Q

one major artery delivers blood to an organ or region

A

simple pathway

28
Q

an ____ ______ is an artery that provides only one path for blood to reach an organ or region

A

end

29
Q

____________ joining together of blood vessels two or more vessels converge to supply or drain same region

A

anastomosis

30
Q

_______ _________ two or more converging arteries to supply same region

A

arterial anastomosis

31
Q

_______ ________ armoire comment then arterial anastomosis comma two or more veins drain same body region

A

venous anastomosis

32
Q

____________ _________ (shunt) transports blood from artery directly to vein, allows areas to be bypassed if body hypothermic

A

atriovenous anastomosis

33
Q

another name for a trio Venus anastomosis is?

A

a shunt

34
Q

another name for a shunt is?

A

atriariovenous astomosis

35
Q

this allows areas to be bypassed if body is hypothermic

A

arteriovenous anastomosis

36
Q

what is a portal system?

A

two capillary beds in sequence

artery- capillary bed- portal vein- capillary bed - vein

37
Q

_____ ____-______ _____ is the sum of diameters of all vessels of a certain type, collectively the total areas of capillaries is the largest because there are so many capillaries.

A

total cross-sectional area

38
Q

______ _____ _______ is inversely related to Total cross-sectional area, blood flow is slow in capillaries, allowing for exchange between Blood and Tissue fluid

A

blood flow velocity

39
Q

total cross-sectional area is __________ related to blood flow velocity

A

inversely related

larger total cross-sectional area lower blood flow velocity

40
Q

how are substances exchanged across capillaries? ________ substances leave or enter blood according to their concentration gradient

A

diffusion ( high to low concentrations)

41
Q

larger solids like some proteins pass through _________ or gaps in ________

A

fenestrations or gaps in sinusoids

42
Q

small solids Like Oxygen can diffuse through __________ cells or ___________ _____

A

endothelial cells or intercellular clefts

43
Q

true diffusion oxygen hormones nutrients move from blood to _________ _____

A

interstitial fluid

44
Q

_______ _____ and ______ diffuse from tissue to blood

A

carbon dioxide and waste

45
Q

in __________ _________ endothelial cells use pinocytosis and exocytosis, take substances in by pinocytosis. transport vesicle across South, secrete substances from Other Side by exocytosis

A

vesicular transport

46
Q

certain hormones in fatty acids are transported across capillaries by?

A

vesicular transport, endocytosis and exocytosis

47
Q

in this process fluids flow down pressure gradient, large amounts of fluids and dissolved substances move in a direction dependent pot pressure of opposing forces

A

bulk flow

48
Q

the opposing forces in bulk flow are?

A

hydrostatic pressure vs. colloid pressure

49
Q

in bulk flow _________ is when fluid moves out of blood, fluid and small solutes flow easily through capillaries openings, large solids blocked, occurs on arterial end of capillary

A

filtration

50
Q

and bulk flow _________ is when fluid move back into blood, occurs at venous end

A

reabsorption

51
Q

_________ pressure is the force exerted by a fluid comma in blood is the force exerted per unit area by blood on vessel wall, promotes filtration from capillary

A

hydrostatic pressure

52
Q

two types of hydro static pressure at the capillary

A

blood hydrostatic pressure, interstitial fluid hydrostatic pressure

53
Q

interstitial fluid hydrostatic pressure is close to_______ at most times

A

0/nothing

54
Q

__________ promotes filtration from capillary

A

blood hydrostatic pressure

55
Q

_______ _______ _______ pressure is osmotic pole do to protein salads

A

colloid osmotic pressure

56
Q

what are two types of colloid osmotic pressure?

A

blood colloid osmotic pressure, interstitial fluid colloid osmotic pressure.

57
Q

considering there are few proteins present in interstitial fluid ______ ________ _______ ______ pressure is relatively low

A

interstitial fluid colloid osmotic pressure

58
Q

blood colloid osmotic pressure is clinically termed?

A

oncotic pressure

59
Q

what type of pressure draws fluid into blood due to blood proteins slash promotes reabsorption

A

blood colloid osmotic pressure

60
Q

how is net filtration pressure calculated?

A

net hydrostatic pressure - net colloid osmotic pressure= net filtration pressure

61
Q

how do you calculate net colloid osmotic pressure?

A

blood colloid osmotic pressure - interstitial fluid colloid osmotic pressure

62
Q

how do you calculate net hydrostatic pressure

A

subtract interstitial fluid hydrostatic pressure from blood hydrostatic pressure.

since interstitial fluid hydrostatic pressure is close to zero at most times it is typically just blood hydrostatic pressure

63
Q

NFP stands for?

A

net filtration pressure

64
Q

cop stands for

A

colloid osmotic pressure

65
Q

HP stands for?

A

hydrostatic pressure

Bio 145 (24 decks)

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