B7.3 & B7.6 - Circulatory System, Blood Vessles

Question 1

Size of artery muscle layer

Answer 1

Thick

Question 2

Size of artery elastic layer

Answer 2

Thick

Question 3

Size of artery outer wall

Answer 3

Thick

Question 4

Arteriole muscle layer size

Answer 4

Thicker than arteries

Question 5

Arteriole elastic layer size

Answer 5

Thin

Question 6

Vein muscle layer size

Answer 6

Thin

Question 7

Vein elastic layer size

Answer 7

Thin

Question 8

Vein wall size

Answer 8

Thin

Question 9

The vain contains _, which prevent

Answer 9

Valves, prevent blood flowing in the wrong direction

Question 10

Structure of the capillaries include

Answer 10

Narrow lumen and thin lining

Question 11

One adaptation of capillaries is that they

Answer 11

Have a short diffusion pathway/ many of them and are branched

Question 13

What is tissue fluid

Answer 13

A watery fluid that surrounds cells and enables substance exchange

Question 14

Where is tissue fluid formed

Answer 14

In the arterial end of a capillary

Question 15

Where does tissue fluid return

Answer 15

In the veinous end of a capillary

Question 16

How does tissue fluid form

Answer 16

High hydrostatic pressure moves water and small molecules from blood to tissues

Question 17

How does tissue fluid return

Answer 17

Low hydrostatic pressure and osmotic pressure from proteins in plasma pull water back into capillaries via osmosis

Question 18

What happens to excess tissue fluid

Answer 18

Is drained into the lymphatic system and eventually returns to blood