Qualification > Sciences
Biology Paper 1 and 3 help HERE ONLY!!!
Kim:
ok many ppl get confused with motor and sensory nuerone so here is way u can remember them
motor nuerone is like ur hand the cell body the hand dendrites rthe finger and ur arm the myelin sheath
and the other one would be sensory
tell me if this helps?. ;)
Aodian:
--- Quote from: Smokethetree on June 07, 2009, 09:51:34 am ---Wat do they mean when they say
- describe the importance of gaseous and solute diffusion, and of water as a solvent
appreciate ur help
--- End quote ---
.
erm i dont reli understand ur question but i'll give it a shot..
Okay gaseous diffusion is obviously important because... *drum roll* we need to breathe!!!! if we dont breathe we DIE!!!
oh and plants need CO2 as well..
pretty much just mention that gaseous diffusion is important because
a) in plants CO2 is needed for photosynthesis and O2 is given out as a by product so that we humans can breathe.. If there is no CO2 being diffused into the leaf via gas exchange then no photosynthesis occurs, no photosynthesis no food, no food plant die, if die no oxygen given out thus WE DIE..
b) for humans its cause we need oxygen for out body cells to respire and produce energy.. we also need gaseous diffusion (alveoli n body cells) so that the by product of respiration which is CO2 can be diffused out since it is not needed in our body... if no CO2 is Diffused out, the levels will build up and in turn again WE DIE
Solute diffusion im guessing willhaev to do with plants... Its about the uptake of mineral ions in the soil i think.. Correct me if im wrong.. But this will haev to do with the fact that plants will need nitrates and magnesium ions so that the leaves will be able to make protein and manesium is needed to make the green pigment chlorophyll.. if it cant diffuse the nutrients.. then it cant make protein.. n magnesium cant produce chlorophyll which means plant cant make food.. and it DIES
now water as a solvent..
water is needed for various chemical reactions in our body.. We need water for metabolic reactions because the minerals and other stuff dissolve in water. When they dissolve in water this enables enzymes to react with them breaking them down into smaller more soluble molecules so tat our body can take them up and partake in the glorious consumption to make us grow, live breathe etc..
and once again if we no water.. we dehydrate.. no metabolic reactions.. WE DIE!!!!!
hope u got that.. :)
Ibiza279:
--- Quote from: Smokethetree on June 07, 2009, 09:51:34 am ---Wat do they mean when they say
- describe the importance of gaseous and solute diffusion, and of water as a solvent
appreciate ur help
--- End quote ---
with the help of gaseous diffusion in our body, we are able to breath in oxygen n breath out carbon dioxide as oxygen diffuses thru the alveoli wall n combines with the haemoglobin of the red blood cell in the capillaries.
with the help of solute diffusion, our body is able to remove urea in the kidneys or reabsorb required amount of water in the kidneys.
water acts as a solvent as it dissolves glucose in it for respiration to take place so that energy is release in the form of A.T.P. water also absorbs heat when sweat is produced in vasodialation and evaporates causing a cooling effect that cools the body.
i hope all this helps tk
247sports:
--- Quote from: Aodian on June 07, 2009, 10:00:43 am ---
--- Quote from: Smokethetree on June 07, 2009, 09:51:34 am ---Wat do they mean when they say
- describe the importance of gaseous and solute diffusion, and of water as a solvent
appreciate ur help
--- End quote ---
.
erm i dont reli understand ur question but i'll give it a shot..
Okay gaseous diffusion is obviously important because... *drum roll* we need to breathe!!!! if we dont breathe we DIE!!!
oh and plants need CO2 as well..
pretty much just mention that gaseous diffusion is important because
a) in plants CO2 is needed for photosynthesis and O2 is given out as a by product so that we humans can breathe.. If there is no CO2 being diffused into the leaf via gas exchange then no photosynthesis occurs, no photosynthesis no food, no food plant die, if die no oxygen given out thus WE DIE..
b) for humans its cause we need oxygen for out body cells to respire and produce energy.. we also need gaseous diffusion (alveoli n body cells) so that the by product of respiration which is CO2 can be diffused out since it is not needed in our body... if no CO2 is Diffused out, the levels will build up and in turn again WE DIE
Solute diffusion im guessing willhaev to do with plants... Its about the uptake of mineral ions in the soil i think.. Correct me if im wrong.. But this will haev to do with the fact that plants will need nitrates and magnesium ions so that the leaves will be able to make protein and manesium is needed to make the green pigment chlorophyll.. if it cant diffuse the nutrients.. then it cant make protein.. n magnesium cant produce chlorophyll which means plant cant make food.. and it DIES
now water as a solvent..
water is needed for various chemical reactions in our body.. We need water for metabolic reactions because the minerals and other stuff dissolve in water. When they dissolve in water this enables enzymes to react with them breaking them down into smaller more soluble molecules so tat our body can take them up and partake in the glorious consumption to make us grow, live breathe etc..
and once again if we no water.. we dehydrate.. no metabolic reactions.. WE DIE!!!!!
hope u got that.. :)
--- End quote ---
LOL WE GOT DT AODIAN...WE WILL ALL DIE :P
HAAHAHAHAHAHH NYC Thanks By the way
Ibiza279:
AODIAN's explanations rite as well i was thinking only n only body :P
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