- entry of pathogens
- Gas exchange
- immune response
- replication of DNA
This is an essay question but I don’t really understand what I could write about each of those examples given above. Please share any ideas you may have
.......…...……………… ¦â¦â¦â¦â¦â¦â¦â¦â¦â¦â¦ .. plasmodium (malaria parasite) needs to transfer from blood of infected host to vector (female Anopheles mosquito) then to blood of victim.
- Gas exchange - O2 needs to reach respiring cells; CO2 needs to be extruded to atmosphere to avoid collection in body, which would cause acidosis (CO2 + H2O ----> H2CO3 [carbonic acid]).
- Haemoglobin - for transfer of O2 to tissues from lung - talk about its structure, the adaptation features of red cell, etc
- immune response - immune cells need to travel to site of infection to recognize 2foreign" material and engulf (T cells or macrophages) OR produce antibodies (Ab)
....â¦...â¦â¦â¦â¦.. Ab need to travel from production site to location of e.g. bacteria.
- replication of DNA - copied DNA needs to move to nuclei of daughter cells in mitosis
.......â¦â¦â¦â¦â¦â¦â¦. mRNA needs to transfer from nucleus via pores to RER.
THIS WILL ONLY GET YOU ABOUT max 10 out of 20 marks.
A) transfer of food material: amino acids, glucose, copper (ceruloplasmin), iron (iron binding protein), fatty acids (mention chylomicrons)
B) transfer of waste material to kidneys for excretion e.g. urea [breakdown product of proteins], creatinine, uric acid [breakdown of RNA + DNA via xanthine], excess water, H+, HCO3-, drugs, etc.
C) transfer of hormones from endocrine organs to body by blood - rich blood supply of e.g. adrenal
D) transfer of pollen by wind; animals (bees)
E) seed dispersal by animal eating fruit and pooing seeds; water (coconut).