1.1

Question 1

What are the four features of mass transport systems?

Answer 1

Vessels
Transport medium
Correct speed
Correct direction

Question 2

What are the four components of blood?

Answer 2

Plasma
Erythrocytes
Leukocytes
Platelets

Question 3

What are the three functions of blood?

Answer 3

Transport
Homeostasis
Acts a as a buffer

Question 4

What three things does blood transport?

Answer 4

Food products
Hormones
Excretory products

Question 5

What type of curve does oxygen dissociation follow?

Answer 5

A sigmoid curve

Question 6

In the blood clotting mechanism what chemical to damaged tissues originally release?

Answer 6

Serotonin

Question 7

What is the effect of serotonin?

Answer 7

It causes the smooth muscle around the damaged area to contract

Question 8

In the blood clotting mechanism what things move to the site of the damaged tissue after contraction?

Answer 8

Platelets

Question 9

What do platelets release?

Answer 9

Thromboplastin

Question 10

What is thrombin composed of?

Answer 10

CA2+ ions and prothrombin

Question 11

In the blood clotting mechanism what is the function of thrombin?

Answer 11

To catalyse fibrinogen into fibrin

Question 12

What does fibrin form?

Answer 12

A blood clot

Question 13

What type of animals have single circulation?

Answer 13

Fish

Question 14

Why is double circulation required for some animals?

Answer 14

They need larger amounts of oxygen

Question 15

What are the function of arteries?

Answer 15

To carry blood away from the heart

Question 16

What three tissues are found in blood vessels?

Answer 16

Elastin fibres
Smooth muscle
Collagen fibres

Question 17

What are the function of veins?

Answer 17

To carry blood back towards the heart

Question 18

What valves do blood vessels contain within them to prevent the back flow of blood?

Answer 18

Semi lunar valves

Question 19

A large surface area to volume ratio means what?

Answer 19

That a transport system is not required