Brainscape's Knowledge GenomeTM

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


See full index

Anatomy II > Hemodynamics > Flashcards

Hemodynamics Flashcards

1
Q

Pressure generated is a result of…

A

Ventricle contraction

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

Veins

A

Lower blood pressure tan arteries
Accommodate increased volume
Steady flow, opposite branching patters than arteries
Blood reservoirs

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

Venules

A

Small veins collecting blood from capillaries

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

Venous Sinuses

A

No smooth muscle

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

Varicose Veins

A

Twisted, dilated, superficial veins
Caused by leaky venous valves
Allow back flow and pooling of blood
Deeper veins not susceptible because of surrounding muscles

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

Portal System

A

Blood flows through two consecutive capillary networks before returning to the heart
Example: hepatic portal system between liver and intestines

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

Anastomoses

A

Points where two blood vessels merge

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

Arteriovenous Shunt

A

Artery flows directly into vein
Shunt changes direction of blood flow
Used to decrease heat loss in the cold

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

Venous Anastomosis

A

Most common blockage
Less serious
Alternative drainage of organs

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

Arterial Anastomosis

A

Collateral circulation (coronary)

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

Blood Distribution

A

60% of blood volume at rest is in systemic veins and venules

15% of blood volume is in arteries and arterioles

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

Venous Constriction

A

Constriction of veins during increased muscular activity or during hemorrhage
Increased Venoconstriction = Increased Preload, Stroke Volume, and Cardiac Output

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

Capillary Exchange

A

Only occurs across capillary walls between blood and surrounding tissues

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

Three Routes of Capillary Exchange

A

Intercellular clefts
Fenestrations
Through cytoplasm

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

Mechanisms Involved in Capillary Exchange

A

Diffusion
Transcytosis
Filtration and reabsorption

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

Filtration

A

Blood pressure drives fluid out of capillary

High on arterial end, low on venous end

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Reabsorption

A

Colloid osmotic pressure draws fluid into capillary
Same on both ends
Results from plasma proteins

18
Q

Oncotic Pressure

A

Net colloid osmotic pressure

19
Q

Dynamics of Capillary Exchange

A

Provides tissue with nutrients

20
Q

Net Filtration

A

At arterial end of capillaries is about 20l/day

21
Q

Net Reabsorption

A

At venous end of capillaries is about 17l/day

22
Q

Starling’s Law of the Capillaries

A

Volume of the fluid and solutes reabsorbed is almost as large as the volume filtered

23
Q

Net Filtration Pressure

A

Determines whether fluids leave or enter capillaries

24
Q

Net Outward Pressure

A

10 mm Hg at arterial end

25
Q

Net Inward Pressure

A

9 mm Hg at venous end

26
Q

Edema

A

An abnormal increase in interstitial fluid if filtration exceeds reabsorption
Not noticeable until 30% above normal

27
Q

Result of Excess Filtration

A

Increased blood pressure

Increased permeability of capillaries allows plasma proteins to escape

28
Q

Result of Inadequate Reabsorption

A

Decreased concentration of plasma proteins lowers blood colloid osmotic pressure
Inadequate synthesis or loss from liver disease, burns, malnutrition, or kidney disease

29
Q

Causes of Edema

A

Poor venous return
Kidney failure
Histamine makes capillaries more permeable
Obstructed lymphatic drainage

30
Q

Consequences of Edema

A

Circulatory shock
Tissue necrosis
Pulmonary edema
Cerebral edema

31
Q

Vasoconstriction

A

Sympathetic stimulation of arterial alpha receptors
Decreases diameter
Increases blood pressure

32
Q

Vasodilation

A

Sympathetic stimulation of beta receptors
Increases diameter
Promotes blood flow

33
Q

Factors Affecting Circulation

A

Pressure differences that drive the blood flow
Resistance to flow
Venous return

34
Q

Blood Flow

A

Amount of blood flowing through a vessel in a given time (ml/min)

35
Q

Perfusion

A

Rate of blood flow per given mass of tissue (ml/min/g)

36
Q

Hemodynamics

A

Physical principles of blood flow based on pressure and resistance

37
Q

Flow Equation

A

DeltaP/R

38
Q

Resistance Equation

A

1/r^4

39
Q

Blood Flow Equation

A

r^4

40
Q

Only Possible Immediate Change to Blood Flow

A

Change in radius

Anatomy II (16 decks)

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