Wk 5 - LE 10: Cardiovascular (concepts in physiology) Flashcards

1
Q

Haemodynamics is …

A

the mechanics of blood motion mainly relating to pressure, resistance and flow

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2
Q

The mechanics of blood motion mainly relating to pressure, resistance and flow is called …?

A

Haemodynamics

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3
Q

Cardiac output relates to ____

A

flow

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4
Q

Mean arterial pressure (MAP) relates to ____

A

pressure

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5
Q

Total peripheral resistance (TPR) is related to ____

A

Resistance

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6
Q

The average MAP is around …

A

little less than 100 mm Hg

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7
Q

Blood flowing from the left side of the heart is _____ blood going to _____

A

arterial (to body)

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8
Q

Blood flowing from the right side of the heart is _____ blood going to _____

A

arterial (to lungs)

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9
Q

Does the pulmonary circuit lie in parallel or series?

A

in series (flows from one to the next)

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10
Q

Why is the pulmonary circuit lie in series?

A

To ensure that ALL blood goes through the lungs to get oxygenated in one direction

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11
Q

From the aorta, the blood vessels go from in ______ to ______ to ensure all organs can receive blood

A

in series to parallel

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12
Q

What would happen if all organs received from in series?

A

Organs downstream would receive blood that is less oxygen rich

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13
Q

What is the only organ that receive CO2 rich blood from another organ?

A

The liver

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14
Q

Is the flow of blood through the systemic circuit greater, less or equal to the blood of the pulmonary circuit?

A

It is equal

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15
Q

Is blood leaving the right and left side of the heart equal?

A

Yes

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16
Q

The flow of blood through the venous vessels is often called…?

A

Venous return

17
Q

The right heart pumps blood to the ______

A

lungs

18
Q

The left heart pumps blood to the ______

A

body

19
Q

The lungs receive about ____% of the total CO

A

20%

20
Q

Blood flow to kidneys and gastrointestinal regions _____ during exercise

A

falls

21
Q

Does the blood flow to the brain increase, decrease or remain constant during exercise?

A

Constant

22
Q

Blood flow = _______ / _______

A

Q = change in pressure / resistance (Q=ΔP/R)

23
Q

What does Q symbolise?

A

Blood flow

24
Q

If you increase resistance (restrict vessel), flow will _____

A

reduce

25
Q

If you decrease resistance (dilate vessel), flow will ____

A

increase

26
Q

What is the average blood flow in L/min?

A

5.0 L/min

27
Q

ΔP is roughly equal to ….?

A

MAP

28
Q

What is the average venous pressure?

A

5 mm Hg

29
Q

What is the average arterial pressure?

A

100 mm Hg

30
Q

TPR is the sum of …(3)

A
  1. Arterial resistance
  2. capillary resistance
  3. Venous resistance