Biology

[equalsmcsquared.livejournal.com]

Greetings, everyone. Please stack your reports next to the roll sheet. Help yourselves to the snack, God knows I won't eat them all.

Today, we will begin discussing human endocrinology.

The essence of multicellularity is the coordinated interaction of the various kinds of cells that make up the body. Cells communicate with each other by chemical signals.

Three kinds of chemical signaling can be distinguished:

autocrine - the cell signals itself through a chemical that it synthesizes and then responds to. Autocrine signaling can occur solely within the cytoplasm of the cell or by a secreted chemical interacting with receptors on the surface of the same cell

paracrine - chemical signals that diffuse into the area and interact with receptors on nearby cells.
Examples are:
The release of cytokines that cause an inflammatory response in the area.
The release of neurotransmitters at synapses in the nervous system.

endocrine - the chemicals are secreted into the blood and carried by blood and tissue fluids to the cells they act upon.

Comments

[jayne-serenity.livejournal.com]

*sets her coffee down on her desk with an almost sweet smile*
*goes to his desk and promptly falls asleep there*

[12parseckessel.livejournal.com]

Han signs in, turns in the report and takes good notes, with the marginalia "Mainstock human."

[forlornslayer.livejournal.com]

Buffy takes her desk and signs in. She looks like she is in deep thought about something.

[sogothcally.livejournal.com]

*signs in*

*continues to wish she hadn't signed up for this class*

*sits through class, looking rather bored*

[lovelylana.livejournal.com]

Lana signs in and turns in her report. She listens intently to the lecture, making copious notes.

[addams-daughter.livejournal.com]

Wednesday finds herself a seat and begins taking careful notes, paying close attention to every word.

[courier-gavin.livejournal.com]

Jake signs in and drops off his report. He sits down and makes notes, head tilted to the side, like he's listening to something besides the teacher.

[bluemanoncampus.livejournal.com]

Hank sits quietly throughout class, taking copious notes. He does not turn in a paper on the body farm.

After class ends, he stays behind to talk with Ms. Sidle.

[notcalledlizzie.livejournal.com]

Elizabeth signs in, and hands across her paper. She's clutching a cup of coffee like it's a lifeline, and is trying not to yawn as she takes her seat.

[iwasawesome.livejournal.com]

Lilly signs in and sits down. She may even be taking notes.

[notstakedyet.livejournal.com]

Angelus approached Sara's desk. He held out a form.

"Hey teach," he said. "Hate to abandon you and your fine teaching but with the work I'm doing in Ethics something's got to give. I need you to sign this so I can drop Bio."

[psycho-barbie.livejournal.com]

Callisto signs in, and hands up her report which doesn't mention anything about supply closets or activities which might have taken place therein.

Her eyebrows crease as she takes notes.

[swerval_zero]

*signs in and hands in her report, which includes parenthetical commentary on the library cleanup experience but is otherwise concise and on-point*

*takes notes*

[master-of-fear.livejournal.com]

Jonathan signs in and hands in his assignment.

He sits down and begins to take notes.

[demonbelthazor]

Belthazor signs in and turns in his report.

[apocalypsesoon.livejournal.com]

*John walks in, sign the sheet, and sits down. He scratches his shoulder absently*

[fates_jaye]

Jaye shows up five seconds late- it still counts as on time!- and has her report done. It's not the best, because ew, bodies, but she tried.

[http://users.livejournal.com/_jubilation_lee/]

*signs in*

*turns in alternative to the body farm trip*


((was pretty sure i did this before but i can't find any proof. just to be safe...))