In Da Club – Membranes & Transport: Crash Course Biology #5

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Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.

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“Concert” music used with permission from Chameleon Circuit.
This video uses sounds from a list of these sounds can be found in the Google document here, along with the citations for this video:

Table of Contents time codes:
1) Passive Transport – 1:17
2) Diffusion – 1:25
3) Osmosis – 2:12
4) Channel Proteins- 4:37
5) Active Transport – 4:58
6) ATP – 5:37
7) Transport Proteins – 6:19
8) Biolography – 6:37
9) Vesicular Transport – 9:02
10) Exocytosis – 9:21
11) Endocytosis – 9:50
12) Phagocytosis – 9:57
13) Pinocytosis – 10:29
14) Receptor-Mediated Endocytosis – 10:48

TAGS: crashcourse, hank green, biology, chemistry, cell, cell membrane, selective permeability, selectively permeable, active transport, passive transport, solution, concentration, concentration gradient, atp, adenosine tri-phosphate, jens christian skou, vesicular transport, phagocytosis, endocytosis Support CrashCourse on Subbable:


Scott “-x-” Blair says:

Tennet the answer is Tennet.

Jet Fire says:

I am confused, if water can travel directly through the cell membrane, then why does it need aquaporins? Why doesn't all water pass through the membrane? I guessed that maybe some water is bonded to other molecules making it to large to diffuse, but I'm not really sure.

JJ says:

Wait, you and John Green are two different people????

aceofk1 says:

The charlie sheen that gives us aids? 3:00

Elijah West says:

Both you and John Green speak, move from topic to topic, and use connections very quickly. Does John Green only do World History?

Naveen Thavathiru says:

Who els is studying for their final?

nmsnerd says:

Wait, so did hank just stand outside a club in line and talk to a camera about cell membranes? Why aren't we discussing this?

Kayla Filiatrault says:

For the record, David Tennant was indeed the better Doctor.

Alex Nelson says:

Damnit why do I have to learn this stuff in class if I'm not going to be a doctor or scientist!?!

Alexis Orr says:

when i learn more from crash course in 11 mins then my bio teacher in 4 months

Jordon Cihanek says:

HypOtonic means a bigger cell
HyPERtonic means a smaller cell

charlandR5 says:

On behalf of a group of several AP Biology students with a test in two days, THANK YOU HANK

Kimin Kim says:

10:09 For once, I feel bad for bacteria

Alex Gharapetian says:

It's crazy how interesting these videos are, I can literally watch all the videos in one sitting. Good stuff sir, I hope you expand into more topics as well.

Aliza canjura says:

2:403:10 best 40 seconds at 0.5 speed LOL

Monica Garcia says:

I repeated adenosine triphosphate at least 50 times

Rodolfo “Rod” Sanchez says:

When he said dopamine, I fighured out where I saw that guy before I ever saw him on a projector screen in class. Tumblr the Musical.

just Candii says:

How come the salt can move across the membrane?

Jaerae Dell says:

You know your shit but you're so fucking annoying stop taking like a fucking dumbass

Jacob Benton says:

that awkward moment when this series taught me more in an hour than my teacher has all year.

Tony Parker says:

Like Charlie Sheen? I don't want HIV lmfao!

spycreb says:

this guy has his shit mixed up

hypotonic = more water outside of cell than inside of cell which causes water to rush in the cell and explode
hypertonic = there is more water inside of the cell than there is outside of the cell, so this causes the water inside of the cell to rush out. the cell will then shrink in size.

Sara Mallory says:

I wish my science teacher just showed these

Cata Yo says:

hey! I have a test and I really need the answer to this question:
What exactly do glycolipids and glycoproteins do on the cell membrane? I mean, why are they placed there and what's their role?

Hope I'll get an answer. Thanks

Audra Irvine says:

Suggestion: Outline at the end of the video: Channel proteins should be under Passive transport.

Daniel Ignacio Villarroel Aguilera says:

Question: Osmosis and diffusion are occurring simultaneously in the cell? Or osmosis happens sometimes and diffusion other times (like, when the solute goes outside, does the water enter the cell at the same time?)? (excuse my english)

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