B4

Question 1

3 characteristics of an artery?

Answer 1

thick outer wall, small lumen and thick layer of elastic fibres

Question 2

3 characteristics of a vein?

Answer 2

thin layer of muscle, large lumen, fairly thin outer wall

Question 3

2 characteristics of a capillary?

Answer 3

very small lumen, wall is 1 cell thick

Question 4

what do valves do ?

Answer 4

stop the backflow of blood

Question 5

what is the main function of the pulmonary system?

Answer 5

to pick up oxygen from the lungs and deposit carbon dioxide

Question 6

what is the main function of the systemic system?

Answer 6

to deliver oxygen to the cells of the body and to pick up carbon dioxide

Question 7

what is coronary heart disease?

Answer 7

arteries that are supplying the heart with blood become narrow due to build up of plaque

Question 8

3 types of surgery to treat coronary hearty disease . . .

Answer 8

stents, bypass surgery, statins

Question 9

3 adaptations of the alveloi?

Answer 9

good blood supply, large surface area, very thin walls

Question 10

tissue definition

Answer 10

group of cells with similar structures and functions

Question 11

organ definition

Answer 11

groups of tissues that carry out an overall function

Question 12

organ system definition

Answer 12

groups of organs that have a general overall function

Question 13

what is the movement of sugar called in a plant

Answer 13

translocation

Question 14

what is water needed for in a plant

Answer 14

support and photosynthesis

Question 15

what are sugars needed for in a plant?

Answer 15

respiration and production of other materials

Question 16

what are mineral ions used for in plants?

Answer 16

production of materials

Question 17

what is transpiration?

Answer 17

the loss of water vapour from the surface of the leaf

Question 18

4 main factors that affect transpiration?

Answer 18

temperature, humidity, wind speed, light intensity

Question 19

3 adaptations plants have to limit transpiration

Answer 19

waxy cuticle on the surface of the leaf, wilting, closing stomata