Topic 2 Biology

Question 1

How we prevent pathogens and microbes entering body

Answer 1

Muscles and cilia
Hair focciles glands in skin producing antiseptic oils
Acid in stomach
Antiseptic fluid in tears

Question 2

How phagocytes work 4 steps

Answer 2

Phagocytes identify pathogens and attach to it
Cyptoplasm then engulfs it
Pathogen is killed and digested
Indigestible residue is removed

Question 3

When would aseptic technique be used

Answer 3

Surgery
Injection
Stictching wounds

Question 4

What are lymphocytes

Answer 4

White blood cells that produce antibodies

Question 5

Ways to prevent contamination in aseptic techniques

Answer 5

Disinfect table
Bunsen burner on beside work place to kill airborne particles
Flame neck of agar bottle
Incubate at 25°c and upside down

Question 6

How lymphocytes work

Answer 6

If infected with pathogens the lymphocyte detects it and produces antibodies which are complementary to pathogens this causes pathogen to clump together which then are engulfed by phagocytes

Question 7

What are lymphocytes

Answer 7

A type of white blood cell found in blood

Question 8

How do vaccines work

Answer 8

Inject dead or inactive pathogens which makes lymphocytes produce antibodies against them so if it occurs again antibodies kill it

Question 9

What does antibiotics only work on

Answer 9

Bacteria

Question 10

Name a type of antibiotic

Answer 10

Penicillin

Question 11

What’s a clear zone

Answer 11

An area on Petri dish where antibiotic has cleared bacteria

Question 12

How was penicillin found and who by

Answer 12

Found by Alexander Fleming when mould came through his window landed on Petri dish and killed bacteria