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

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Flashcards in Lecture 20: Lymph and Venous Circulation and Cardiac Output (Hayward) Deck (32)
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1
Q

resistance to inflow –> hydrostatic pressure in capillary

A

decreases

2
Q

resistance to inflow –> absorption into capillary

A

decreases

3
Q

increased blood volume –> capillary filtration

A

increases

4
Q

hypoproteinemia –> capillary reabsorption

A

decreased

5
Q

hypoproteinemia

A

low blood protein

6
Q

where do lymph vessels converge and empty into?

A

subclavian veins

7
Q

lymph flow is via: (2)

A

1) muscle contraction

2) respiration

8
Q

heart failure means

A

heart can’t move blood forward

9
Q

lymph dysfunction leads to

A

edema. Increased filtration pressure beyond the capacity of the lymphatics

10
Q

3 main causes of lymph dysfunction

A

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

11
Q

does venous system have pulsatile activity?

A

No

12
Q

RAP =

A

right arterial pressure

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)

14
Q

How does breathing modulate central venous pressure during inspiration?

A

Venous pressure drops, resulting in increased venous return

15
Q

How does breathing modulate central venous pressure during expiration?

A

Venous pressure increases, resulting in decreased venous return

16
Q

increased venous sympathetic activity –> peripheral venous pressure

A

increases

17
Q

increased blood volume –> peripheral venous pressure

A

increases

18
Q

increased skeletal muscle pump –> peripheral venous pressure

A

increases

19
Q

increased inspiratory movement –> peripheral venous pressure

A

increases

20
Q

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

A

increases

21
Q

increased central venous pressure –> cardiac filling

A

increases

22
Q

venous return

A

amount of blood flowing back to the heart

23
Q

decreased preload –> cardiac output

A

decreases

24
Q

increased central venous pressure –> preload

A

increases

25
Q

increased peripheral venous pressure –> atrial pressure

A

increases

26
Q

increased venous return –> end diastolic ventricular volume

A

increases

27
Q

increased peripheral venous pressure –> stroke volume

A

increases

28
Q

pronounced jugular pulses are associated with _____atrial pressure

A

increased

29
Q

preload =

A

filling

30
Q

If central venous pressure decreases, but contractility increases —> cardiac output?

A

increases. Shifts cardiac-function curve to the left

31
Q

cardiac index

A

expected cardiac output taking several variables into consideration including age, sex, temp, etc.

32
Q

How is more blood brought to muscles during exercise?

A

constriction of venous vessels

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