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- Right? Last time I sow you was back in 9th grade right?
- Wait is that you Cassie?
- Yes 9th grade with Ms Freed. Remember learning all the Bio terms that I don't even use now.
- Nick! OMG! My dearest friend.Its been a long time.
- Right? I liked the teacher just Biology wasn't for me
- I remember Passive transportation and how it moves from low to high? and did not use energy (ATP) right?
- Right? Still remember those Bio terms? if so let me see.
- NO! Passive moved from high to low concentration. Honestly speaking Cell transportation was my favorite topic.
- Passive transportation had three types if I'm not mistaken. One of them being Simple division? Diffusion?
- Wait then what moves ions and polar substances and moved from high to low concentration?
- Simple Diffusion. It is a passive transport type that moves non polar and no charge substances only through the membrane.
- That's Facilitated diffusion. Substances cross the biological membrane via specific trans-membrane integral proteins
- I once read that Osmosis' main function is stabilizing the internal environment of an organism as it helps keeping water levels balanced.
- We also have Osmosis as another type of passive transport types.
- I remember this one. It's the diffusion or movement of water molecules through a membrane.
- You really did your research on this didn't you? HAHAHA
- I mean it's not that hard to forget osmosis it involves water and only water.
- Molecules are said to naturally flow down their concentration levels and concentration level....
- So all these passive transportation types moves from high to low why not low to high?
- WAIT..Concentration Gradient is a difference of concentration between two regions and must exist for molecules to flow.
- Yes, so among the passive transportation requirements, particles should move from high to low and also without the use of energy.
- For real. Anyways I have reached my destination. It was nice to remember the good ol days.
- It's so crazy how all these different stuff happen in our body very single day and we are not even aware.
- Bye Cassie. Nice to see you again.
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