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Edexcel IGCSE Biology Paper 2 discussion - 7th June

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about 76 probs
Reply 161
Avatar for tempz
tempz
2
Thats wrong

ADH
Pituitary Gland
Changes Permeability of collecting duct in nephron to reabsorb more water.

Hormones can only ever be produced by a gland, the hypothalumus regulates levels of ADH

and for the table it was...
Platelets - Blood Clotting - Fragment
Phagocytes - Ingest Pathogens - White Blood Cell
Lymphocytes - Produce Antibodies - White Blood Cell

Vaccination is beneficial as it produces MEMORY CELLS that ensure the SECONDARY IMMUNE RESPONSE is faster than the PRIMARY IMMUNE RESPONSE and allow the phagocytes to ingest the pathogen strain faster.

BLOOD CLOTTING , low platelets in blood mean wounds will not fully clot allowing for blood loss and pathogen entry.

GM - changing the genetic makeup of organsim by altering its DNA. In crops a gene can be introduced for immunity to bacteria/pathogens allowing for greater yield and profit for farmer.
(edited 12 years ago)
Reply 162
Avatar for glurblug
glurblug
I put:

progesterone
corpus luteum
completes the lining of the uterus

that OK?
the easiest one was oestrogen, ovaries, puberty
I wrote insulin..pancreas & lower blood glucose!
adrenaline and the adrenal gland is the easiest thing to remember. Speeds up heart rate
Reply 166
Avatar for Samkay
Samkay
Original post by Flamezone

Original post by Flamezone
Should have done triple award.


I did... triple and double award take the same exam first

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