biology knowledge questions

Question 1

what are the four components of blood

Answer 1

red blood cells, white blood cells, platelets and plasma

Question 2

name one substance carried by plasma

Answer 2

any from: carbon dioxide, urea, amino acids, hormones

Question 3

what is the function of platelets

Answer 3

to clot the blood

Question 4

name on adaptation of red blood cells

Answer 4

biconcave shape (increased surface area)
no nucleus (more space for oxygen) contains haemoglobin (binds to oxygen)

Question 5

name the three blood vessels

Answer 5

arteries,veins and capillaries

Question 6

which blood vessel takes blood back to the heart?

Answer 6

veins

Question 7

name the main artery leaving the heart

Answer 7

aorta

Question 8

name the blood vessel they carried blood to the lungs

Answer 8

pulmonary artery

Question 9

name an adaptation of veins

Answer 9

contains valves (prevent back flow)

Question 10

name an adaptation of arteries

Answer 10

thick walls (withstand pressure)

Question 11

name the two types of chambers in the heart

Answer 11

atrium and ventricles

Question 12

what group of cells control the resting heart rate

Answer 12

pacemaker

Question 13

what procedure is commonly used for coronary heart disease

Answer 13

stent

Question 14

what drug is used to reduce cholesterol levels

Answer 14

statins

Question 15

what is a disadvantage of artificial hearts

Answer 15

risk of blood clots

Question 16

how are the alveoli adapted for gas exchange

Answer 16

large surface area, thin walls, good blood supply

Question 17

what is the function of the xylem tissue

Answer 17

to transport water from roots to leaves

Question 18

what is the function of the phloem tissue

Answer 18

to transport sugars from leaves to the rest of the plant

Question 19

what is the name given to the movement of sugars in a plant

Answer 19

translocation

Question 20

where is the water lost from in a leaf

Answer 20

stomata

Question 21

what cells control water loss from a plant

Answer 21

guard cells

Question 22

what is the name given to the process of water loss from the leaves

Answer 22

evaporation

Question 23

what factors affect transpiration

Answer 23

humidity, temperature, light intensity and air movement

Question 24

what is the name given to the movement of water through a plant

Answer 24

transpiration