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GCSE OCR 21st Century Triple Science (CBP1-7) Thread

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Reply 1960

azo

Does somebody know the answers to the tissue fluid questions? I think I got them but just want to check :smile:

Reply 1961

lyricalvibe

Original post by Kattkin

What did the diving question have to do with? I think I got all the stuff about pressure and resurfacing slowly ect but it felt more like the other sciences than biology. Weiird... It doesn't fit in with anything I revised??

I put in about nanotechnology in her wetsuit to block off the air or whatever as well as explaining why she would get pain and damage from the first source using the 2nd source, I didn't put in the slowly ascend part because it felt like chemistry but now I regret it :frown:

the point about nanotechnology and clay nanoparticles I think is wrong however as no-one else has put it so I'm hoping for 3/4 marks on this

Reply 1962

username1344042

The last 2 six-markers got me confused..but I put:

Insecticides
~ Killing an organism may affect organisms that feed on it
~ These organisms may then become extinct
~ It may lead to bioaccumulation
~ It could poison humans if it is on their food

Diving
~ Further she goes = lower pressure = more bubbles of air in blood
~ These bubbles may cause pain and damage
~ She should rise slowly (like the fizzy water) so that the impact is minimal
~ She could breathe more slowly to make sure the concentration of oxygen in her blood is fairly low and constant

:confused:

Reply 1963

Student.178

I put automatic system for glasshouse, I just guessed.

Reply 1964

Hixiy24

What did everyone tick for the last two tick box questions?

Reply 1965

shivani210598

Original post by JazzyT17

I put automatic system for glasshouse, I just guessed.

thats what i put as well... Someone mentioned about negative feedback? :/

Reply 1966

Student.178

Original post by shivani210598

thats what i put as well... Someone mentioned about negative feedback? :/

Yeah I don't think it is negative feedback because processing centre effector that sort of stuff isn't B7 unless it's related to body temperature but you never know they may be right :smile:

How many marks was it?

Reply 1967

Scepticism

I got that wrong too! Someone mentioned Homeostasis which it probably is..

Reply 1968

username1344042

I'm pretty sure it was negative feedback

Reply 1969

azo

Original post by olmyster911

I'm pretty sure it was negative feedback

I put negative feedback :smile:

Reply 1970

Scepticism

That paper didn't cover anything to do with muscles or the heart tbh.. quite disappointed :frown:

Reply 1971

Swag>education

What was the capillary question? I thought it was easy apart from the diver question

Reply 1972

Scepticism

It asked about how tissue fluid was formed, and why is it essential I believe..

Reply 1973

DDan123

It was a good paper in general, but there were a few "iffy" questions. Like was the experiment in a greenhouse closed loop or open looped? And what conclusions could you make about the two people in the diabetes question? The last 6 marker at the time was dodgy because there was barely any science you could include? Hopefully I did enough for an a*

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Reply 1974

corporal

Original post by Scepticism

It asked about how tissue fluid was formed, and why is it essential I believe..

And naming the process it carries out - Diffusion

Reply 1975

Scepticism

Was the answer for that Open Loop system? PLEASE TELL ME IT WAS.. crossed out closed loop as you'd require water..

Reply 1976

Student.178

Original post by DDan123

There was a diabetes question?!

Reply 1977

Fishhy34

Was the boys experiment closed loop or open loop and what did you write about the seed production and whom was right or wrong?

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Reply 1978

corporal

Original post by Fishhy34

Was the boys experiment closed loop or open loop and what did you write about the seed production and whom was right or wrong?

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I wrote open loop becuase the glass house get it's sunlight from outside ecosystem which means it isn't a close loop system