Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A and p > Lecutre 11 > Flashcards

Lecutre 11 Flashcards

1
Q

Capillary exchange

A

Movement of substances in and out of capillaries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Most important means of exchange

A

Diffusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What affects the movement of fluid form capillaries

A

BP, Capillary permeability and osmosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Diffusion in cappilaries

A
  • lipid soluble cross capillary walls diffusion through plasma membrane
  • water-soluble diffuse through intercellular spaces or through fenstatrions of capillaries
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Net filtration pressure

A

Force responsible for fluid moving across capillary walls, two forces affect pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Hydrostatic pressure

A

physical pressure of blood flowing through
the vessels or of fluid in interstitial spaces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Osmotic pressure

A

movement of solutes (plasma or tissue fluid)
through a membrane (plasma membrane) in the presence of a non-
diffusible solute (large proteins); Large proteins do not freely pass
through the capillary walls and the difference in protein
concentrations between the blood and interstitial fluid is
responsible for osmosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Net Filtration pressure equation

A

Net hydrostatic pressure minus net osmotic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Net hydrostatic pressure equation

A

CHP - IFP = net hydrostatic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

CHP

A

capillary Hydrostatic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

IHP

A

interstitial fluid hydrostatic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Interstellar fluid hydrostatic pressure

A

hydrostatic pressure exerted by the interstellar fluid of tissue surrounding the capillaries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Net osmotic pressure equation

A

BCOP-ICOP= Net osmotic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

BCOP

A

Blood colloid osmotic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

ICOP

A

Interstitial fluid colloid osmotic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Venous veins function

A

return to the heart increases due to the increase in BV, Venious tone and arteriole dialation

17
Q

Venous tone:

A

a continual state of partial contraction of
the veins as a result of sympathetic stimulation

18
Q

What does gravity do to BP

A

In standing position it increases BP below the heart and decreases pressure above the heart

19
Q

What does muscular movement do

A

improves veinous return

20
Q

Local Control

A

Most tissues blood flow is proportional to metabolic needs of tissues

21
Q

Nervous system

A

Responsible for routing blood flow and maintaining BP

22
Q

Hormonal Control

A

Sympathetic action potentials stimulate epinephrine and norepinephrine

23
Q

What do local factors do for capillary bed

A

Regulate metarterioles and precapillary sphincters

24
Q

What does increased metabolism of a tissue result in

A

vasodilator substances (carbon dioxide, lactate, potassium)

25
Q

What does vasodilator substance cause

A

Vasodilatation and relaxation of sphincters, blood flow increases to serve working tissue

26
Q

Autoregulation of blood flow

A

Blood flow can increase 7 to 8 times as a result of vasodilation of metarterioles and precapillary sphincters in response to increased rate of metabolism

27
Q

Vasomotion

A

period contraction and relaxation of precapillary sphincters

28
Q

Long-term local control

A

capillaries become denser in a region that regularly has a increased metabolic rate

29
Q

Nervous control of BF in tissures

A
  • minute to minute regulation of local control
  • provide means blood be shunted from one large area of the peripheral circulatory system to another by increasing resistance
  • Sympathetic division most important innervates all vessels except capillaries, precapillary sphincters, and most metarterioles
30
Q

Vasomotor center located

A

lower pons and upper medulla oblongata

31
Q

Excitatory part

A

Tonically active, causes vasomotor tone- norepinephrine

32
Q

Inhibitory part

A

Causes vasodilation by decreasing sympathetic output

33
Q

Sympathetic stimulation of adrenal medulla

A

causes output of norepinephrine and epinephrine into circulation causes vasoconstriction in vessels

34
Q

Vasomotor tone

A

constant sympathetic stimulation of vessels results in continual state of partial constrictio

A and p (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions