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Edexcel A2 Biology Unit 5 (6BIO5) - 22/06/2011- OFFICIAL THREAD !

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Reply 4380
Avatar for rabz*
rabz*
Original post by JizzMan
would weaken it, active immunity will not be strong. antigens will be able to attack the body more succesfully since inflammatory responses wont be very effective

i dunno im just gassing about anything i can remember lol


Better than what I could come up with!
Reply 4381
Avatar for JizzMan
JizzMan
fire more questions for the next half hour, man wanna answer before he go sleep!
Reply 4382
Avatar for AdamBeee
AdamBeee
Any last minute predictions on what is going to come up?


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Reply 4383
Avatar for JizzMan
JizzMan
Prostheses maan, watch out for prostheses
Reply 4384
Avatar for fiza_1
fiza_1
Original post by del1rious
what is the difference in plant hormones and human hormones?


plant hormones:
produced through out the plant
local cells and tissues are targeted


human hormones:
regulated by the CNS
specific effects
specified target
Reply 4385
Avatar for rabz*
rabz*
Outline the process by which peptide hormones can effect gene transcription
Reply 4386
Avatar for JizzMan
JizzMan
the hormones could bind to DNA at the start of a gene, and then act as an activator or a repressor by either increasing or decreasing the rate of transcription
Reply 4387
Avatar for rabz*
rabz*
Explain how BAT is able to regulate both core body temperature and body weight.
Reply 4388
Avatar for JizzMan
JizzMan
Original post by rabz*
Explain how BAT is able to regulate both core body temperature and body weight.


ooh whats the answer to that? Is it something like BAT controls temperature to keep it cold enough for the fat stores, so then the stores could be used to release glucose energy and lower body fat whenever energy input is lower than energy output?
Reply 4389
Avatar for Panda29
Panda29
3
From the spirometer graph.. How do work out the tidal volume and all the other stuff? I don't understand it.


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Reply 4390
Avatar for JizzMan
JizzMan
Original post by kanchu
From the spirometer graph.. How do work out the tidal volume and all the other stuff? I don't understand it.


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remember the equation "ventilation rate = breathing rate x tidal volume" rework that to your satisfaction for every question regarding that ****
Reply 4391
Avatar for 19941994
19941994
Im so scared guys ahh going to bed but will probably wake up early to do a bit more revision :frown: good luck everybody!


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Reply 4392
Avatar for JizzMan
JizzMan
good luck yo, keep a calm head and think logically :cool:
Reply 4393
Avatar for rabz*
rabz*
Original post by JizzMan
ooh whats the answer to that? Is it something like BAT controls temperature to keep it cold enough for the fat stores, so then the stores could be used to release glucose energy and lower body fat whenever energy input is lower than energy output?


Im not really sure but i was thinking something along..

High calorie fat or cold temperatures stimulate the SNS
The SNS secretes noradrenaline
BAT cells multiply and release T3 locally
T3 stimulates production of UCP-1
UCP-1 disrupts the respiration bu uncoupling electron transfer from ATP production
Energy is lost as heat so more glucose and fatty acids needed to provide for the metabolic process.
Need to eat more to get the same amount og energy. And the energy is lost as heat instead of for ATP synthesis
Reply 4394
Avatar for JizzMan
JizzMan
wow, that is a nice answer!

alright I'll try to remember atleast half of that haha
Reply 4395
Avatar for rabz*
rabz*
Original post by 19941994
Im so scared guys ahh going to bed but will probably wake up early to do a bit more revision :frown: good luck everybody!


This was posted from The Student Room's iPhone/iPad


Good Luck
Reply 4396
Avatar for JizzMan
JizzMan
alright I'll be off now, good luck to rabz and the rest of you!





GONNA GET WEEEIIIIRD TOMORROW NIGHT ONCE THIS EXAM IS FINISHED AND SUMMER STARTS!!
Reply 4397
Avatar for rabz*
rabz*
Original post by JizzMan
alright I'll be off now, good luck to rabz and the rest of you!





GONNA GET WEEEIIIIRD TOMORROW NIGHT ONCE THIS EXAM IS FINISHED AND SUMMER STARTS!!


Good Luck JizzMan and everyone else!
Reply 4398
Avatar for Bright
Bright
11
EVERYONE GONE?! *foever alone revising* :'(

SO SCARED.
Reply 4399
Avatar for fiza_1
fiza_1
Original post by Bright
EVERYONE GONE?! *foever alone revising* :'(

SO SCARED.


not everyone :wink: what are you going over ?

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