12. Endocrinology

Stanford University.

Can you hear me like this?

Is this better?

Yes.

Yes.

OK, great.

So yeah, so like Tom said, feel free at any point

to interrupt us with questions.

Just raise your hand if something's confusing,

stuff like that.

Also, just like with the other lectures,

feel free to email us after class.

Our emails are on CourseWare.

You can find us that way.

So today, we're gonna provide a little bit of background

context introducing sort of [INAUDIBLE] place

in the context of the other sort of buckets of this class,

or I guess sort of think about it generally.

We're gonna talk specifically then

about peptide and steroid hormones,

different types of hormones.

Then we're gonna see some specific interesting things

about them that you might want to know.

Then we're gonna talk about how the brain controls hormones.

So hormone release, and then eventually feeding back

to how hormones influence the brain.

Sort of this dual communication system that's pretty neat.

But we're gonna touch on all those things today.

So Tom's gonna start out with some background context.

OK.

So way back when, when life first arose, things was--

were inside single cells, right.

Individuals were single cells who

had to interact with their environment.

They had to get food, they had to get rid of waste,

they had to make sure they were in the right pH and temperature

so that they could do well for themselves.

And as a single cell, it seems like a simple enough task.

But as things got more complicated