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

Reply 780

f9filly

oh i see, thanks guys
*feels dumb*

Reply 781

abcdemilyxx

2

f9filly

oh i see, thanks guys
*feels dumb*

lol don't worry, there's been loads of confusion about the case study.

Reply 782

f9filly

thanks, i feel so annoyed about this exam, i don't know what to do or think!
Just want it to be over

Reply 783

sidrah

8

I've nearly finished all the past papers for this unit.. I haven't seen anything synoptic come up so I'm assuming the only synoptic links will be with the article..
Got to finish all my article prep today, thank goodness for the resources on here...
I feel so stressed about this exam.. Stupid A*!

Reply 784

kappleberry

7

koop

it doesn't, its the sympathetic nerve connecting the brain to the SAN so only heart rates affected

Page 165 of snab tb says Vagus/Parasympathetic nerve is used to send nerve impulses along to SAN to decrease Heart Rate

Reply 785

kappleberry

7

sidrah

I've nearly finished all the past papers for this unit.. I haven't seen anything synoptic come up so I'm assuming the only synoptic links will be with the article..
Got to finish all my article prep today, thank goodness for the resources on here...
I feel so stressed about this exam.. Stupid A*!

You'll do great. Hit tht A*. Just work work work now!
We're in chat if thatll help you? But if you got revision planned...do thattt!

Reply 786

prag92

Does anyone know if we are given a whole new blank pre-release article or if that question will just be based on a certain extract from it??

Reply 787

abcdemilyxx

2

prag92

Does anyone know if we are given a whole new blank pre-release article or if that question will just be based on a certain extract from it??

we're given a new blank one, and we'll be asked several questions from any parts of the booklet.

Reply 788

sidrah

8

kappleberry

You'll do great. Hit tht A*. Just work work work now!
We're in chat if thatll help you? But if you got revision planned...do thattt!

Thanks, and yeah, unfortunately revision calls. I'll probably just keep up to date with this thread every time I get sick of revising and take a break..

Reply 789

prag92

abcdemilyxx

we're given a new blank one, and we'll be asked several questions from any parts of the booklet.

Peachy.

Reply 790

jimber

9

wheres the past papers online? I can find like 1 on the edexcel site :s:

Reply 791

_joshb_

anyone fancy writing a short summary of each core practical? :smile:

mainly I am confused about the reason for the sodalime/KOH (orwhatever) in the spirometer and respirometer. I don't really understand the spirometer/respirometer at all, or how to describe it in exam question format. habituation is easy though :smile:

Reply 792

hollywoodbudgie

20

Photoreceptors detect light hitting the retina... what detects a lack of light hitting the retina? :/
Sorry stupid question I know...

Reply 793

abcdemilyxx

2

jimber

wheres the past papers online? I can find like 1 on the edexcel site :s:

there's only 1 new one, try the old spec. salters-nuffield.

Reply 794

prag92

jimber

wheres the past papers online? I can find like 1 on the edexcel site :s:

Its the new spec so only a specimen paper is around at the moment :frown:

Reply 795

fizzybubble

_joshb_

anyone fancy writing a short summary of each core practical? :smile:

mainly I am confused about the reason for the sodalime/KOH (orwhatever) in the spirometer and respirometer. I don't really understand the spirometer/respirometer at all, or how to describe it in exam question format. habituation is easy though :smile:

The sodalime/KOH absorbs CO2

Reply 796

hutch999

www.deberker.com there's about 5 past papers on there, does anybody know where there's any more?

Reply 797

jimber

9

ahh that sucks! where are the old ones? i can't find any :s:

my teacher gave me Jun 07 which is pretty similar to what we are doing...

Reply 798

rashahamed

_joshb_

anyone fancy writing a short summary of each core practical? :smile:

mainly I am confused about the reason for the sodalime/KOH (orwhatever) in the spirometer and respirometer. I don't really understand the spirometer/respirometer at all, or how to describe it in exam question format. habituation is easy though :smile:

the sodalime/ KOH is used so it can absorb the CO2, allowing the O2 concenration to be measured, if the Co2 is not removed the respirometers reading will not change because the same voume of co2 and o2 are produced during aerobic respiration.

hope this helped!!

Reply 799

abcdemilyxx

2

_joshb_

anyone fancy writing a short summary of each core practical? :smile:

mainly I am confused about the reason for the sodalime/KOH (orwhatever) in the spirometer and respirometer. I don't really understand the spirometer/respirometer at all, or how to describe it in exam question format. habituation is easy though :smile:

soda lime/KOH absorbs the co2 so you're breathing in only o2 not co2 and you only need to measure the amount of o2.

spirometer measures breathing rate and tidal volume and the amount of air in the chamber decreases over time. it can be used before during and after exercise.
the respirometer has a manometer containing ink and as the insects in the tube respire, the ink will move upwards on the side that the insects are on due to pressure change which it controlled by a syringe on the other tube.

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

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you