Lecture 20: Lymph and Venous Circulation and Cardiac Output (Hayward) Flashcards

1
Q

resistance to inflow –> hydrostatic pressure in capillary

A

decreases

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2
Q

resistance to inflow –> absorption into capillary

A

decreases

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3
Q

increased blood volume –> capillary filtration

A

increases

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4
Q

hypoproteinemia –> capillary reabsorption

A

decreased

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5
Q

hypoproteinemia

A

low blood protein

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6
Q

where do lymph vessels converge and empty into?

A

subclavian veins

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7
Q

lymph flow is via: (2)

A

1) muscle contraction

2) respiration

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8
Q

heart failure means

A

heart can’t move blood forward

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9
Q

lymph dysfunction leads to

A

edema. Increased filtration pressure beyond the capacity of the lymphatics

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10
Q

3 main causes of lymph dysfunction

A

1) arteriole dilation
2) increased venous pressure
3) increased capillary permeability

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11
Q

does venous system have pulsatile activity?

A

No

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12
Q

RAP =

A

right arterial pressure

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13
Q

venous return is dependent upon pressure gradient between 3 things

A

1) peripheral venous pressure
2) great veins
3) RAP

(Differences between peripheral and central venous pressure)

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14
Q

How does breathing modulate central venous pressure during inspiration?

A

Venous pressure drops, resulting in increased venous return

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15
Q

How does breathing modulate central venous pressure during expiration?

A

Venous pressure increases, resulting in decreased venous return

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16
Q

increased venous sympathetic activity –> peripheral venous pressure

17
Q

increased blood volume –> peripheral venous pressure

18
Q

increased skeletal muscle pump –> peripheral venous pressure

19
Q

increased inspiratory movement –> peripheral venous pressure

20
Q

increased peripheral venous pressure w/o changing central venous pressure–> venous return

21
Q

increased central venous pressure –> cardiac filling

22
Q

venous return

A

amount of blood flowing back to the heart

23
Q

decreased preload –> cardiac output

24
Q

increased central venous pressure –> preload

25
increased peripheral venous pressure --> atrial pressure
increases
26
increased venous return --> end diastolic ventricular volume
increases
27
increased peripheral venous pressure --> stroke volume
increases
28
pronounced jugular pulses are associated with _____atrial pressure
increased
29
preload =
filling
30
If central venous pressure decreases, but contractility increases ---> cardiac output?
increases. Shifts cardiac-function curve to the left
31
cardiac index
expected cardiac output taking several variables into consideration including age, sex, temp, etc.
32
How is more blood brought to muscles during exercise?
constriction of venous vessels