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Physiology 2 > The vasculature > Flashcards

The vasculature Flashcards

1
Q

What are arterioles?

A

Control vessels of the circulatory system

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2
Q

What are the 9 main arteries?

A

Aorta
Carotid
Brachial
Radial
Iliac
Femoral
Gastric
Hepatic
Renal

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3
Q

What are the 7 major veins?

A

Vena cava
Jugular
Brachial
Basilic
Cephalic
Common iliac
Femoral

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4
Q

What blood enters the arteries?

A

Oxygenated

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5
Q

What blood is removed by the veins?

A

De-oxygenated

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6
Q

What do arteries divide into?

A

Arterioles then capillaries

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7
Q

Capillaries reform into…

A

Venules then veins

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8
Q

Arteries

A

Thick, highly elastic walls with high radii that pass from heart to organs

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9
Q

Arterioles

A

Highly muscular with small radii that determine distribution

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10
Q

Capillaries

A

Thin walled with large CSA that determine extracellular fluid distribution

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11
Q

Veins

A

Thin walled with large radii that pass from heart to organs

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12
Q

What do veins and arteries act as?

A

Blood and pressure reservoirs

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13
Q

What are the different permeabilities of capillaries?

A

Continuous (less permeable)
Fenestrated (more permeable)
Discontinuous (highly permeable)

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14
Q

What is the unit for blood pressure?

A

mmHg

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15
Q

What is minimum blood pressure?

A

80mmHg

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16
Q

When does rate of flow increase?

A

When the diameter of arteries decreases

17
Q

Why do arterioles constrict at rest?

A

Sympathetic tone

18
Q

When is vasoconstriction caused?

A

Increase in noradrenaline caused by arteriole diameter change

19
Q

When does arteriole diameter change?

A

Changes in sympathetic activity

20
Q

What causes blood vessels to dilate?

A

Adrenaline

Physiology 2 (12 decks)

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