MASS TRANSPORT IN HUMANS Flashcards

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1
Q

Tissue fluid formation & return

A
  1. High hydrostatic pressures forces fluid out
    2.large porteins remain in capillary
  2. Lowers the water potential in capillary
  3. Water enters calillary via osmosis
  4. Excess water is removed from tissues via lymph vessels
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2
Q

Mass flow definition

A

Mass flow in the bulk movement of liquids due to pressure difference

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3
Q

Cardiac output equation

A

CO = stroke volume x heart rate

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4
Q

Improtance of heart valves

A

Prevents backflow

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5
Q

Blood flow through heart

A

Heart —> lungs —> heart —> tissues —> heart

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6
Q

Pressure in chambers

A
  1. Blood volume increases pressure in atrium
  2. Pressure in atrium greater than in ventricle
    3 atriventicular valves open
  3. Blood volume increases pressure in ventricle
  4. Pressure in ventricle greater than in atrium
  5. Atriventicular valve closes
  6. Pressure in ventricles is greater than in aorta
  7. Semi lunar valves open
  8. Pressure in aorta is greater than in ventricle
  9. Semi lunar valve closes
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7
Q

Risk factor in coromary heart disease

A

High cholesterol diet + high lipid diet + lack of excersice + smoking = high blood pressure + increases blood toxins + increases cholesterol level = damage to endothelium wall

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8
Q

Capillaries

A

Only has endotheical layer
Small diameter so creates friction this reduces blood pressures

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9
Q

Arterioles

A

Eslastic layer is thinner
Muscle layer is thicker
Causes fall in blood pressure as greater frictiom between blood and vessel wall

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10
Q

Artery

A

Outer layer = goves support and stregth to wall
Endothelial layer = one cell thick and its a smooth layer so reduces friction
Elastic layer = streches and recoils to maintain a hydrostatic pressure on the blood

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