Quickies

Question 1

Fish ventilation

Answer 1

1) Buccal opercular pump
2) movements of operculum and buccal cavity are syncronised
3) Mouth opens increasing in vol of the buccal cavity
4) Water enters
50 operculum bulges slightly pushing outwards
6) Water moves into the opercular cavity
7) As mouth closes operculum opens and pressure in opercualr cavity decreases
8) This coordinated movement causes water to flow over to the gills

Question 2

What gives a fish a large SA

Answer 2

primary llame/ secondary llamle

Question 3

Tracheal system

Answer 3

1) Air enters spiracole
2) transport through to trachea
3) trachea divode into smaller tubes called tracheoloes
4) Tracheoloes are open and filled with a fluid called tracheal fluid - gases need to be dissolved
5) Gaseous exchange occurs between the tracheole and tracheal fluid

Question 4

Insect ventilation

Answer 4

Tracheal fluid withdran intot issue fluid in order to increase SA of the tracheole exposed to air
- more O2 can be absorbed when isect is active

Question 5

Sampling mosqitoes

Answer 5

1) sampling before and after treatment
2) unbiased
3) sweep net
4) diff weathers
5) large number of samples
6) standardised sweeping procedure
7) mark - recapture
8) calculate mean

Question 6

Memory cells

Answer 6

1) Recognsie virus
2) produce clone
3) change into plasma cells
4) produce antibodies
5) Secondary immune repsonse