Introduction Flashcards

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1
Q

What is the main function of the cardiovascular system?

A

Transport

  • from external to internal environments
  • from cell to cell
  • materials leaving the body
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2
Q

Give an example of transport from external to internal environments

A

Oxygen
Nutrients
Water

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3
Q

Give an example of transport from cell to cell

A

Waste
Immune system
Hormones

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4
Q

Give an example of transport when materials leave the body

A

Metabolic waste
Heat
CO2

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5
Q

What is the basic arrangement of the cardiovascular system?

A

Right side of the heart
Lungs (via pulmonary circulation)
Left side of the heart
Body (via systemic circulation)

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6
Q

The right and left side of the heart are in _____ with each other

A

series

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7
Q

What does the output of the right ventricle equal?

A

The output of the left ventricle

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8
Q

What is a vascular bed?

A

An organ

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9
Q

What is constant about blood reaching a vascular bed?

A

The oxygen level is the same at all vascular beds

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10
Q

What ensures blood flow is unidirectional?

A

One-way valves

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11
Q

What is systole?

A

Phase of ventricular contraction and ejection

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12
Q

What is diastole?

A

Phase of ventricular relaxation and filling

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13
Q

What is cardiac output?

A

Volume of blood pumped per minute

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14
Q

What determines cardiac output?

A

Stroke volume

Heart rate

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15
Q

What is pulse pressure?

A

Systolic pressure - diastolic pressure

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16
Q

How do you work out arterial blood pressure?

A

Systolic pressure - diastolic pressure/ 3

+ diastolic pressure

17
Q

What determines pressure in the arterial system?

A

Resistance to blood flow

Blood volume

18
Q

What else does arterial blood pressure equal?

A

Cardic output x total peripheral resistance

19
Q

What is vasodilation?

A

Widening of arterioles

20
Q

What is vasoconstriction?

A

Narrowing of arterioles

21
Q

What percentage of body weight is blood?

A

7%

22
Q

How is arterial blood pressure regulated?

A

Negative feedback control