AP Biology Lab 1: Diffusion and Osmosis

Paul Andersen starts with a brief description of diffusion and osmosis. He then describes the diffusion demonstration and how molecules move over time. He then explains the concepts behind the osmosis lab and how potatoes are affected by increasing sucrose molarity.
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I learned more from this video than I did in my 4 hour bio class. Yay, Thank You!

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Thank you so much for clarifying it I have a test tomorrow and this helped me understand it

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Great lesson!! I just done the egg osmosis lab for huge bonus!! Glad you exist!!

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[@bradclarke7874]

You said from hypotonic to hypertonic, but isn't the high concentration of water to low (inside the potato) hyper to hypo?

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very simple but efficient video
thanx

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wow.. this is great(!) Thanks a million!
Got an ISA on this tomorrow..!

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[@anahyl6421]

How come glucose what found in the beaker? Was its molecules small enough to penetrate the membrane?

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thanks for sharing, found that easier to understand compared to the way that i was taught as found that it was explained better

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OMY GOSH I FINALLY GET IT .. THANK YOU SIR.

[@bp2596]

The units under percent change in the table are wrong. They're supposed to be % not g.

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[@bosszac6147]

i have a question! Please help me.. how can you measure the sugar concentration like how can you tell if it's .2M or .8M .. i need help T^T

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Thanks for the help! :)

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Shoutout to my bio class!

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I'm right there with you!

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thx u helped me study

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Are we able to use any other type of food instead of potato's??

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Life saver!!!

[@julissavesely1710]

For this lab in my AP class, we have to do an investigative inquiry and change ONE variable in either experiment. Any suggestions? Me and my partner thought we might try switching the water to milk in the POTATO LAB but would that work considering you're measuring water potential?

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change the sugar for salt

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what id you do?

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Helpful *****

[@Abhinair66]

Thanks

[@omari6108]

With the potato in 1.0M of sugar, why does it lose water? Does sugar suck it out some how? Why does water not fill it in?

[@nicoletrappe9235]

+Omari Thompson The solution that the potato is so hypertonic to the composition of the potato that the water in the potato will come out and try to equalize the solution that it is in because it has a high concentration. AKA high concentration in the outside= water rushes to outside= potato loses mass

[@alexross26]

What do you mean by the molarity of potatoes? Do you mean sugar concentration in the potatoes?

[@johncunningham9404]

+Alex Ross Yes. It is measured in moles, the SI Unit

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You are making a bad class into a decent class

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thanks

[@oliviahylton9430]

just did this lab in my bio honors class

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thx

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your awesome:)

[@hanpark_]

in the fourth column in the table, why is the percentage change in grams?
But other than that this video was a lifesaver! No seriously. Thank you! :) :D

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handy video..dont have to study a whole chapter.. :)

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