00:34 = What is homeostasis? 01:18 = Why body temperature needs to be controlled 02:14 = Why blood pH needs to be controlled 02:44 = Why blood glucose concentration needs to be controlled in terms of water potential 04:19 = Negative feedback + positive feedback 06:25 = Exam questions and mark schemes
hey if blood glucose concentration is high wouldn't that lower the water potential in the cell so cause more water to come into the cell rather than out ?
Hi! Blood and body cells are separated (by cell membranes) so a high blood glucose concentration would lower the blood's water potential, therefore water will move out of the cells and into the blood by osmosis. Hope this makes more sense :)
00:34 = What is homeostasis?
01:18 = Why body temperature needs to be controlled
02:14 = Why blood pH needs to be controlled
02:44 = Why blood glucose concentration needs to be controlled in terms of water potential
04:19 = Negative feedback + positive feedback
06:25 = Exam questions and mark schemes
if you start the first chapter with 00:00 and paste all of this in the description TH-cam automatically chapters the video for you
Simple, straight to the point video, well explained. Absolutely fantastic. Well done :)
Your videos are top tier 🤝
have my exam tomorrow i’m terrified. thank u so much for these videos i’ll always be grateful😭🙏
Hope you fail 😇
10:13 with question B isn’t that a different topic (skeletal muscles) because what does that have to do with homeostasis
It is a different topic, but you are assessed on how you can link topics together, especially in paper 3 :)
hey if blood glucose concentration is high wouldn't that lower the water potential in the cell so cause more water to come into the cell rather than out ?
Hi! Blood and body cells are separated (by cell membranes) so a high blood glucose concentration would lower the blood's water potential, therefore water will move out of the cells and into the blood by osmosis. Hope this makes more sense :)
Not made any sence there is already lower water potential in cells why water will fall out of cells from lower to higher ?plz
Clear this
is this everything i need to know for the exams ?
Yes :)
is your name meg?
Nope
@@AlevelBiologyHelp how about Emma
@@elliesmith7518 No :)
YOU ARE A LIFESAVER
god bless