Biology Predictions/Thoughts (2 Viewers)

[tropics...]

guys what are beta and alpha cells in the production of glucagon and insulin?

 

[ButteryNucleotide]

guys what are beta and alpha cells in the production of glucagon and insulin?

they're both cells in the islet of langerhans which is a group of pancreatic cells responsible for regulating blood glucose

beta cells secrete insulin, alpha cells secrete glucagon

insulin decreases blood sugar by signalling glucose uptake, glucagon increases blood glucose by promoting glucose synthesis

 

[reniiiblaseee]

guys what are beta and alpha cells in the production of glucagon and insulin?

theyre sensor cells in the pancreas, with beta cells being involved in high bgl and alpha cells in low bgl

 

[reniiiblaseee]

does anyone know anything abt this im lost:
kidney and the moment of waste and the replenishment of dialysate solution

 

[sophiagake]

does anyone know anything abt this im lost:
kidney and the moment of waste and the replenishment of dialysate solution

i THINK its like about how the nitrogenous waste in an affected patient's blood diffuses out of their blood to move into dialysate to passively move these wastes from areas of high solute concentration to area where its low to filter out the blood to then replace back into patient once their blood has been filtered idrk sorry but soething like that like the waste move from high area of concen to low

 

[sophiagake]

wait

does anyone know anything abt this im lost:
kidney and the moment of waste and the replenishment of dialysate solution

wait sike i dont know if thats what ur asking

 

[reniiiblaseee]

i THINK its like about how the nitrogenous waste in an affected patient's blood diffuses out of their blood to move into dialysate to passively move these wastes from areas of high solute concentration to area where its low to filter out the blood to then replace back into patient once their blood has been filtered idrk sorry but soething like that like the waste move from high area of concen to low

no no it is this its smth abt solute and its in the mcq of hsc 2022 i dontr get it

 

[Trial&Error]

no no it is this its smth abt solute and its in the mcq of hsc 2022 i dontr get it

whats the actual question?

 

[reniiiblaseee]

whats the actual question?

 

[Trial&Error]

View attachment 49946

Okay so when the blood is going through the dialysis machine it flows downwards and is adjacent to another flowing solution of dialysis solution. There needs to be a maintained concentration graident for maximum effieciency and to do that both streams need to flow in opposite directions. So you can cross A and C out.

Now when the blood goes through the machine it starts off highly concentrated with urea and eventually becomes less concentrated. This is represented by the left gradient on each diagram. To mainatain the gradient, the dialysis solution (on the right) flows upwards and needs to be least concentrated when the blood is most concentrated. Remember from yr 11 that a concnetration gradient is formed when there's higher concentration on one side of the membrane than the other, allowing diffusion.

Thus the answer is b. edit: I meant "D". The answer's not b.

 

[lazystudentzzz]

Okay so when the blood is going through the dialysis machine it flows downwards and is adjacent to another flowing solution of dialysis solution. There needs to be a maintained concentration graident for maximum effieciency and to do that both streams need to flow in opposite directions. So you can cross A and C out.

Now when the blood goes through the machine it starts off highly concentrated with urea and eventually becomes less concentrated. This is represented by the left gradient on each diagram. To mainatain the gradient, the dialysis solution (on the right) flows upwards and needs to be least concentrated when the blood is most concentrated. Remember from yr 11 that a concnetration gradient is formed when there's higher concentration on one side of the membrane than the other, allowing diffusion.

Thus the answer is b.

i just did that paper and the answer was D on the nesa marking guidelines (idk y tho)

also r there any sites i can use for band 6 responses? the nesa samples are very simple

 

[Trial&Error]

i just did that paper and the answer was D on the nesa marking guidelines (idk y tho)

also r there any sites i can use for band 6 responses? the nesa samples are very simple

Oh whoops sorry I meant D because if you look on the diagram when the new dialysis solution is added (bottom arrow on right side) it should be lightest in colour since the solution is "fresh" and it gets darker as it goes up since the urea diffuses from the blood into it. My bad.

Also I don't know where to find sample solutions. I don't think the nesa sample answers are supposed to be band 6. They're probably very riskily band 5 maybe.

 

[tropics...]

i

i THINK its like about how the nitrogenous waste in an affected patient's blood diffuses out of their blood to move into dialysate to passively move these wastes from areas of high solute concentration to area where its low to filter out the blood to then replace back into patient once their blood has been filtered idrk sorry but soething like that like the waste move from high area of concen to low

im cooked

 

[Trial&Error]

Do we need to know the structure and stuff of neurons and how the nervous system works in depth?

 

[lazystudentzzz]

should we study ab yr11 structure of plants? (stomata, other features/layers, cohesion-tension theory etc.)
any other yr11 concepts we need to know??

 

[Trial&Error]

should we study ab yr11 structure of plants? (stomata, other features/layers, cohesion-tension theory etc.)
any other yr11 concepts we need to know??

I think revise anything related to yr12 concepts. Like structures of plants that protect against pathogens, diffusion for dialysis, natural selection for the continuity of a species, etc

 

[reniiiblaseee]

should we study ab yr11 structure of plants? (stomata, other features/layers, cohesion-tension theory etc.)
any other yr11 concepts we need to know??

only like plant adaptations which is closed stomata, increased stomata etc but thats not year 11 tbh

 

[reniiiblaseee]

Do we need to know the structure and stuff of neurons and how the nervous system works in depth?

bro i wanna know this too i only memorised how it looks like the dendrites, axons etc also only know the graph for action potential cuz im not sure what else to do for this

 

[lolcti]

Do we need to know the structure and stuff of neurons and how the nervous system works in depth?

Yes

 

[99.95dreams]

yall i'm confused

why does this question have that answer? in the table, nothing but malaria is actually a disease, so how can the low levels of them following vaccination disprove the notion that vaccines are specific to particular diseases? in fact all of them are secondary complications of measles, so their explanation makes no sense from a biological viewpoint... like obviously some vaccines combat multiple diseases like the triple antigen one, but the data doesn't seem to support it in this scenario.