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AS PE > The vascular system > Flashcards

The vascular system Flashcards

1
Q

What are the four factors that make up the vascular system?

A

Blood
Vessels
Vascular shunt mechanism
Control of blood disilation

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2
Q

What are the 3 functions of blood?

A

Transportation
Protection
Homeostasis

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3
Q

What does the blood transport around?

A

CO2, 02, Nutrients

Hormones and enzymes

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4
Q

How does the blood provide protection?

A

Immune system

clotting

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5
Q

What does homeostasis mean?

A

Wanting a stable blood temperature and blood acidity

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6
Q

How does blood maintain a stable enviroment?

A

To decrease temperature, blood runs closer to the skin And gets more 02, white increases heart and gets rid of lactic acid

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7
Q

What 4 things make the blood structure?

A

Red blood cells
white blood cells
Platelets
plasma

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8
Q

What are the use for red blood cells?

A

To carry O2 for myaglobin and has a large surface area

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9
Q

What is the purpose of white blood cells?

A

Library of diseases, releases anti bodies

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10
Q

what are job of plateletes ?

A

To aid clotting aka scabs

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11
Q

What is the purpose of plasma?

A

To carry h2O and salts (when sweating levels decrease)

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12
Q

What is system of the vessels?

A 
Heart
Artery's
Arterioles
Capillaries
Venules
Veins
Repeat
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13
Q

What are the factors of the veins?

A

Low pressure
Large Luma
carry blood to heart valves

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14
Q

What are the factors of the artery’s?

A

Carry blood away from heart
Small lumen
think wall to withstand blood pressure

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15
Q

what are the factor of the capillaries?

A 
Gaseous exchange 
1 cell thick
large surface area
Small diffusion pathway
slow blood flow
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16
Q

What is the vascular shunt mechanism?

A

redirection of blood by opening and closing of arterioles

17
Q

what are the main mechanisms of vascular shunt mechanism?

A

Vasoconstriction

Vasodialataion

18
Q

What is Vasoconstriction?

A

Narrowing of luman to decrease blood flow to the digestive system (Liver, intestine)

19
Q

What is vasodilation?

A

Opening of luman to increase blood flow to working muscles

20
Q

What do pre capillary sphincters do ?

A

Control of capillary beds, for example opening at working muscles and closing at digestive system

21
Q

Does the brain always need the same amount of blood?

A

yes

22
Q

What changes in the body occur during exercise?

A 
Lactic acid
movement
CO2
temprature
Pressure
23
Q

What receptors pick up the changes in the body?

A

Proprioceptors- movement
Baroreceptors-pressure
Chemoreceptors- PH levels
Thermoreceptors- temperature

24
Q

What do the receptors tell?

A

The brain (medulla Oblangata)

25
Q

What does the brain tell?

A

the vasomotor control centre

26
Q

What nerve then carries the message?

A

SYMPATHETIC NERVE

27
Q

What does the nerve tell the vascular system to do?

A

To vasconstrict or Vasoldialate

AS PE (17 decks)

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