B5.9/B5.11 - Defence responses in animals and plants

Question 1

skin defences

Answer 1

-acts as a barrier
-produces antimicrobial secretions
-healthy micro organisms act as an extra barrier

Question 2

Nose hairs and mucus

Answer 2

-traps particles containing pathogens

Question 3

Mucus of trachea and bronchi

Answer 3

-lined with cilia
-wafts up mucus to throat to be swallowed

Question 4

stomach acid

Answer 4

-destroys micro organisms in mucus you swallow/in food

Question 5

Tear glands

Answer 5

-produces liquid containing enzymes to kill micro organisms (lysozyme)

Question 6

White blood cells

Answer 6

-ingest micro organisms
-produces antibodies
-produces antitoxins

Question 7

antibodies

Answer 7

-target pathogens
-unique one for each pathogen

Question 8

antitoxins

Answer 8

-counteract toxins released by pathogens

Question 9

cellulose in plants

Question 10

tough waxy cuticle on surface

Answer 10

-acts as a barrier to prevent entry of pathogens

Question 11

Bark on trees/layer of dead cells on leaves

Answer 11

-protective layer
-when dead cells shed and fall so do pathogens

Question 12

leaves fall

Answer 12

as leaves fall so do pathogens

Question 13

chemical barriers in plants

Answer 13

-produce antibacterial chemicals
-poison

Question 14

antibacterial chemicals

Answer 14

-prevent bacterial diseases in plants

Question 15

poison

Answer 15

-produced to deter herbivores

Question 16

Physical barriers in plants

Answer 16

-cellulose in plants
-tough waxy cuticle on surface
-Bark on trees/layer of dead cells on leaves
-leaves fall

Question 17

Mechanical barriers in plants

Answer 17

-thorns or hairs
-leaves that droop
-mimicry

Question 18

thorns and hairs

Answer 18

deter animals from eating/touching them

Question 19

leaves that droop

Answer 19

-dislodges insects
-frightens animals

Question 20

mimicry

Answer 20

tricks animals into not eating them