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AQA GCSE Biology Paper 2 (Higher Combined) 8464/2H - 7th June 2024 [Exam Chat]

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Reply 20

does anyone know whther we need to know the in detail negative feedback process for thyroxine? or just know it has a negative feedback response

Reply 21

Original post
by jajahjhajhsja
does anyone know whther we need to know the in detail negative feedback process for thyroxine? or just know it has a negative feedback response


Yes I think we do. When thyroxine levels are low:
Hypothalamus produces TRH.
This causes the pituitary gland to produce TSH.
This causes the thyroid gland to produce more thyroxine.
So thyroxine levels increase and return back to normal levels.

Thyroxine stimulates the basal metabolic rate.

Reply 22

Original post
by YellowBadger2
Yes I think we do. When thyroxine levels are low:
Hypothalamus produces TRH.
This causes the pituitary gland to produce TSH.
This causes the thyroid gland to produce more thyroxine.
So thyroxine levels increase and return back to normal levels.
Thyroxine stimulates the basal metabolic rate.

thank you so much that is so helpful!

Reply 23

Original post
by YellowBadger2
Yes I think we do. When thyroxine levels are low:
Hypothalamus produces TRH.
This causes the pituitary gland to produce TSH.
This causes the thyroid gland to produce more thyroxine.
So thyroxine levels increase and return back to normal levels.
Thyroxine stimulates the basal metabolic rate.

Tbh i dont think this will come up this year

Reply 24

Original post
by Es-Sk
Tbh i dont think this will come up this year

why not?

Reply 25

Original post
by jajahjhajhsja
why not?

bc it came up last year.

Reply 26

Original post
by Es-Sk
bc it came up last year.

ohhh right i didn't know that

Reply 27

Original post
by Es-Sk
Tbh i dont think this will come up this year


I’ve got a note of everything we need to know on paper 2, I don’t want to take any chances. Hoping for an 8-8 overall. Previous aim was 7-7 but I think I can push higher than that. Most people on here are aiming for 9-9 though so it’s a bit discouraging sometimes 😅

Reply 28

what topics is likely to come up twmr?

Reply 29

Original post
by YellowBadger2
I’ve got a note of everything we need to know on paper 2, I don’t want to take any chances. Hoping for an 8-8 overall. Previous aim was 7-7 but I think I can push higher than that. Most people on here are aiming for 9-9 though so it’s a bit discouraging sometimes 😅

same i really need minimum of an 8-8 and i think im already on track.

Reply 30

Ecology+Inheritance, Variation and Evolution are both easy topics for this paper so my revision has been focused on Homeostasis which I think is the most difficult Biology topic.

Reply 31

Guys anyone got a comprehensive predictions list please I would rlly appreciate it!!

Reply 32

I am looking forward to science paper 2s. I got the highest grade in my class of grade 7/8 when I did my paper 2 science mocks.

Reply 33

any predictions please?

Reply 34

How did it go, everyone? :smile:


Spoiler

Reply 35

how was it guys

Reply 36

Original post
by znsbhatti
how was it guys

decent

Reply 37

what did everyone get for first 6 marker

Reply 38

What is the answer for the punnet square question

Reply 39

Original post
by Stormhsjj
What is the answer for the punnet square question

50%

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