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Bpk 205 > Lec 21 > Flashcards

Lec 21 Flashcards

1
Q

Each side of heart function as

A

Independent pump

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2
Q

Elastic systemic arteries are

A

Pressure reservoir

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3
Q

Systematic veins are

A

Volume reservoir

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4
Q

In arterioles

A

Adjustable screws=variable resistance
Lower resistance = higher diameter= lower BP
screw=sympathetic effect

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5
Q

In venules, BP

A

Is low

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6
Q

Artery tissues

A

High smooth
High elastic
Medium fibrous
Low epithelium

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7
Q

Arteriole tissues

A

High smooth
Low epithelium

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8
Q

Capillaries tissue

A

One layer epithelium

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9
Q

Venule tissue

A

Medium fibrous
Low epithelium

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10
Q

Vein tissue

A

Medium fibrous
Medium elastic
Medium smooth
Low epithelium

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11
Q

Cardiac output at rest vs exercise

A

5.8 L//min
Vs
25.6 L/min

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12
Q

During exercise less blood goes to

A

Brain/kidney/GI

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13
Q

Most of blood goes to

A

88% to skeletal muscle

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14
Q

Resistance to blood flow increase as

A

Radius decrease

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15
Q

Vasodilation

A

Decrease resistance

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16
Q

Vasoconstriction

A

Increased resistance

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17
Q

Larger tube

A

Slower blood flow

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18
Q

Veloctiy of blood flow will

A

Increase as blood flow rate increase
Decrease as tubes get larger

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19
Q

Blood pressure through circulation,

A

loose pressure

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20
Q

losing pressure in circulation called

A

pressure gradient

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21
Q

Pressure lost through circulation is due to

A

Friction

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22
Q

Friction in circulation is between

A

blood And vessel walls

23
Q

friction in vessel walls increase as their diameter

A

decrease

24
Q

flow is proportional to

A

pressure gradient

25
Q

flow is inversely proportional to

A

resistance

26
Q

F(flow) formula is

A

dP/R

27
Q

veins selectively —- to increase flow to skeletal muscle

A

Vasodilate

28
Q

Mean systematic blood pressure is caqlculated via

A

avg btw systolic and diastolic pressure

29
Q

Mean systematic pressure when 120/80

A

93

30
Q

Pressure gradient of blood is generated by

A

Cardiac contractions

31
Q

Thick, elastic arteries are

A

pressure reservoir

32
Q

thin, expandable veins are

A

volume reservoir

33
Q

Venous return

A

flow of blood into right atrium from peripheral vessels

34
Q

valves ensure — flow

A

one-way

35
Q

how valves ensure of one-way flow

A

1- valves in veins prevent backflow
2- when skeletal muscle compresses the veins, they pushes the blood toward heart skeletal muscle pump

36
Q

capillaries has —- individual diameter but —- total cross sectional diameter

A

smallest
largest

37
Q

what determine velocity of blood flow

A

TOTAL cross sectional area of vessels

38
Q

higher total cross sectional will lead to —- blood flow

A

slower

39
Q

CApillary bed is available all the time in every region?

A

No

40
Q

Precapillary sphincters open/close capillaries in response to

A

metabolic condition

41
Q

Metarteriols

A

divert blood flow if sphincters are closed

42
Q

Metarterioles can act as

A

Bypass channels

43
Q

Capillaries are —- to some degree

A

leaky

44
Q

non leaky capillaries in –

A

brain tissue

45
Q

capillary density is related to

A

metabolic activity cellls

46
Q

capillaries tissue is

A

single layer flattened epithelial tissue

47
Q

leak in capillaries is from —- to —-

A

blood to interstitial cells

48
Q

what leaks from blood?

A

-gases
-water
-ions
-rarely protein

49
Q

how much filtered out of capillaries

A

3L/day

50
Q

excess tisuue fluid is picked up by

A

lymphatic vessels

51
Q

lymph returns excess tissue fluid to

A

venous circulation at subclaivian vein

52
Q

During ventricular ejection, blood presuure

A

will cause arteries to stretch and expand and store pressure in elastic walls

53
Q

During isovolumc ventricular relaxation, how blood goes forward

A

the pressure that was stored in elastic walls, will recoil to maintain pressure

Bpk 205 (30 decks)

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