multicellular organisms

Question 1

hormones

Answer 1

chemical messengers released from endocrine glands that travel through the bloodstream and act only one cells that have a specific and complementary protein receptor

Question 2

insulin

Answer 2

hormone produced by pancreas in response to high glucose

Question 3

what does insulin stimulate

Answer 3

insulin uptake in pancreas

Question 4

pollen

Answer 4

male gamete in plant produced in anther

Question 5

sperm cell

Answer 5

male gamete in animals

Question 6

gaurd celss

Answer 6

found on either side of the stoma and control gas exchange

Question 7

stoma

Answer 7

ores on leaves

Question 8

transpiration

Answer 8

evaporation of water through the stomat on leaves

Question 9

transpiration rate

Answer 9

speed of water lost through stomata

Question 10

companion cell

Answer 10

support cell souroounding seive tube cells, have nuclei

Question 11

seive plates

Answer 11

preforated plate joining seive tube cells

Question 12

seive tube cells

Answer 12

cellss with no nucleus that make up ploem

Question 13

plasma

Answer 13

liquid part of blood

Question 14

red blood cell

Answer 14

transport oxygen and carbon dioxide to and from tissue

Question 15

white blood cell

Answer 15

part of the immune system, recognises and destroys pathogens

Question 16

haemoglobin

Question 17

red blood cell specialised

Answer 17

biconcave disk, no nucleus but contains haemoglobin that allows them to transport oxygen in the form of oxyhaemoglobin

Question 18

oxyhaemoglobin

Answer 18

molecule formed when oxygen combines with haemoglobin

Question 19

pathogen

Answer 19

disease causing micro-organsims (virus, bacteria and fungi)

Question 20

phagocyte

Answer 20

white blood cell that can engulf and digest pathogen

Question 21

lymphocyte

Answer 21

white blood cell that can produce antibodies

Question 22

ventricle

Answer 22

one of the two chambers where blood leaves the heart

Question 22

atrium

Answer 22

one of the two chambers where blod enter the heart

Question 23

valve

Answer 23

structure that prevents blackflow

Question 24

aorta

Answer 24

blood leaves heart to go to body through it

Question 25

vena cava

Answer 25

blood enters heart through it

Question 26

pulmenary artery

Answer 26

blood blood leaves heart to go to lungs

Question 27

pulmonory vein

Answer 27

blood return to heart from lungs

Question 28

coronary artery

Answer 28

blood supplied to muscles of heart through it

Question 29

capillary

Answer 29

narrowest fo blod vessels where gas exchange hapeens

Question 30

artery function and structure

Answer 30

carry blood away from heart ( pulmanry artery, aorta) thick muscular walls- narrow channel - high pressure can detect pulse

Question 31

vein fuction and sturcture

Answer 31

carry blood to heart (vena cava + pulmanory vein ) thinner muscular walls, large central channel- low pressure no pressure - has valves

Question 37

Capillary network

Answer 37

Network of the smallest,thin walled vessels where exchange of materials take place

Question 38

Lungs

Answer 38

Organs where exchange of oxygen and co2 take place

Question 39

Absorption

Answer 39

Movement of molecules from one form to another e.g digestive system to circulatory system

Question 40

Alveoli

Answer 40

Thin walled sacks of in lungs where gas exchange takes place

Question 41

Small intestine

Answer 41

Organ where absorption of materials from food occurs

Question 42

Villi

Answer 42

Thin walled projectiles which line the small intestine giving a large surface area for absorption