B4 Organising animals and plants

Question 1

what is plasma?

Answer 1

liquid that contains red blood cells, white blood cells m platelets and transport proteins

Question 2

what other substances can plasma transport around your body?

Answer 2

waste carbon dioxide, Urea , small soluble substances

Question 3

what do red blood cells do?

Answer 3

contains haemoglobin that binds to oxygen so oxygen can be transported around the body

Question 4

what do white blood cells do?

Answer 4

your bodies self defence system

Question 5

what are the 2 types of white blood cells?

Answer 5

Lymphocytes which produce antibodies and phagocytes that engulf and digest invading bacteria and viruses

Question 6

what make up the circulatory system?

Answer 6

blood , blood and the heart

Question 7

what do platelets do?

Answer 7

cell fragments that clot the wound

Question 8

what are the main types of blood vessels ?

Answer 8

veins, arteries and capillaries

Question 9

what do valves do?

Answer 9

prevent back flow of the blood

Question 10

what type of circulatory system do humans have ?

Answer 10

double circulatory system

Question 11

what do arteries do?

Answer 11

carry blood away from your heart, usually oxygenated

Question 12

what do veins do?

Answer 12

carry blood towards heart away from organs , usually low oxygen blood

Question 13

what so capillaries do?

Answer 13

huge network of tiny vessels that link the veins and arteries

Question 14

what are stents?

Answer 14

metal mesh inflated inside of your artery to stop them from closing

Question 15

what are statins?

Answer 15

drugs that reduce cholesterol levels in the blood reducing risk of coronary heart disease

Question 16

process of breathing in?

Answer 16

1. ribs move up and out and diaphragm flattens, the volume of the chest increases
2. increased volume means lower pressure in chest
3. atmospheric pressure is higher than air inside the chest so air is drawn in.

Question 17

process of breathing out?

Answer 17

1. ribs fall and diaphragm moves up , the volume of the chest decreases
2. decrease in volume means increased pressure in the chest
3. pressure in the chest is higher than atmospheric pressure so air rushes out.

Question 18

how are alveoli adapted for their role?

Answer 18

large surface area, rich supply of capillaries , gas can diffuse efficiently as a result

Question 19

what phloem do?

Answer 19

transports dissolved sugars from leaves to rest of plant

Question 20

what does xylem do?

Answer 20

transports water and minerals ions from root to rest of plant`

Question 21

whats transpiration?

Answer 21

loss of water vapour from the surface of plant leaves

Question 22

what parts of the plant control gas exchange and water loss?

Answer 22

stomata and guard cells

Question 23

what factors affect transpiration ?

Answer 23

factors that affect photosynthesis , temperature, humidity, air flow, light intensity