Homeostasis and Cell Transport

Hey, guys, I just wanted to give you a video.

Help you review for Unit five with the title was

homely little Stasis and still transport eso.

First thing we'll cover is Pastor Transport.

All right, we know the passive transport, obviously, is the

type of senator to transport that does not require any

cellular energy.

When I saw your energy would be a teepee.

So we remember the three types of pastor transport.

There's diffusion, osmosis and facilitated diffusion.

All right, um, we'll start off basically with diffusion effusions,

just particles moving from a high concentration to a little

concentration way.

Remember that?

That's one of the definitions that we had.

Um and then we'll move on toe osmosis.

Now, as Moses is water moving from high to low

concentration. And we understand the water is so vital to

our bodies that it actually has its own name.

And the movement or the diffusion of water from high

to low concentration is actually refer to his osmosis.

Then we'll remember.

We talked about facilitated diffusion, and that is still particles

moving from high to low concentration.

But it's with the use of a carrier or channel

protein that is embedded in the cell membrane, which allows

those particles to diffuse through the cell membrane again, moving

from high to low concentration.

All right, um, we'll move on in a way from

passive transport, which didn't I require any cellular energy, and

you'll remember that active transport actually requires energy from the

cell. That energy is 80 p, which is short for

a dentist.

Sing triphosphate, and we'll get into how cells utilize a

teepee in a minute.

One example was of actor Transport is the sodium potassium

pump, and that is when sodium is actually pumped out

or into, um, the sell through the cell membrane, and

it requires the use of some 80 p.

We remember also that the sodium potassium pump is not

a pop per se, but that the pump is actually

a protein that is embedded in the mosaic of the

cell member.

All right, um, and what actually happens well, sodium is

going to be pumped, uh, into out of the cell

membrane. Ah ah.

Phosphate group is donated from a tp.

Remember, a dentist sing triphosphate, so a teepee has 35

straight groups.

One of the five straight groups actually binds to the

protein which caused that protein to change shape, thus releasing

sodium, um, into out of the sale.

All right.

And you need to remember that, um, the process that

the sodium pump utilizes, um, in that process to potassium

molecules are used for every three sodium molecules that are

pumped against their concentration.

Grady in.

And you know, that actually means when something's moved against

this concentration radiant.

That means that the particles are now moving from low

to high concentration.

Okay, so that is that is also a difference.

Um, from diffusion.

Yeah. Okay, then we'll move over now to these processes

of cellular transport.

One of them being in dose I toast to look

at the term.

And those scientists we remember that e and that prefix

actually means inside.

Okay, we can interpret as being inside.

So in those psychosis is the process.

When cells bring large molecules inside.

Okay, Um, there two types of endo side toasts one

will refer to is faggot psychosis.

Or you can think of it a cell eating and

Pino psychosis, which is we can also think of ass

cell drinking.

All right, So think of the difference.

Large, solid pollack particles brought into the cell that would

be fantasized doses and more liquid or fluid particles brought

into the cell that would be known as Pino psychoses.

All right, and then anything.

When the cell secretes a releases molecules from the cell

membrane to the outside, to the extra cellular fluid anywhere

outside the cell, that is XO psychosis, and I remember

the prefix to that word X or out.

Or exit, however you need to remember it.

But excellent.

XO Santos is when the sales increase.

Always these releases molecules, Um, then we'll move on to

our favorite part of this lesson.

And that is the topic of Tony City, where we

cover the three ah types of solutions, which are in

comparison to what's actually inside of the cell so we

can talk about a hyper tonic solution.

I had photonic solution or an isotonic solution again.

Remember that hyper tonic solutions, actually, because of the prefix

hyper, contain more saw you'd than you have inside of

the cell again, hyper tonic solutions who have a greater

percentage of saw you'd than the percentage of saw you

that is located in the sale.

And if you have a hyper tonic solution.

Ah, a byproduct of that is that water will tend

to rush out of the cell.

Okay, so water is gonna have a net movement out

of the cell.

Now we move on to Hypo Tonic.

Okay. We'll realize that the solution actually has a has

less saw you two in it than there is compared

to what is inside of the cell.

So in other words, the cell has a greater saw

you concentration than what's in the solution.

When we find ourselves when a cell is actually placed

in a hypo tonic solution will also realize that since

there is less Saul, you'd in a solution.

Then there will be more water in the solution.

Therefore, water will tend to rush in where to the

sale. There will be a greater movement or net movement

of water into a cell.

Okay, eso and we realize that this is the type

of situation where that plants like plants like hi bo

tonic solutions because that forces water thio rush into inside

of it sells creating a board generating thio turker pressure.

And that's the solution that plants would prefer to be

in. I'll go back and mentioned that hyper tonic cells

will actually cause water to, um, rush out of the

cell. And that's and that's not good for any type

of cell, animal or plant.

And that brings us to the last type of solution,

which is an isotonic solution.

I'm here.

If you look at the prefix, I so we'll think

of equal.

Okay, I saw that prefix equal.

Um, and we'll see that in an isotonic solution.

You have the same amounts of saw you'd and water

in the solution as you have in the cell.

So the concentrations or percentages of saw you and water

are similar on either side of that cell membrane.

And in other words, they're similar or the same.

Inside the cell as they are outside the cell, they've

actually reached equilibrium.

And so you'll see a CE faras water goes.

You'll see in that movement of water inside and outside

of itself, inside and out of the cell, in an

equal rate at an equal rate.

So isotonic solutions are actually preferable for animal cells because

that's sort of the more that's the more balanced solution.

And, um, animal cells thrive in this sort of solution.

so there are other things that you need to study,

but I believe that I covered the main points.

If you take note Oh, uh, you know, look back

at your student notes.

Watch some of the videos that I've actually loaded for

you. Take note on your on your student notes and,

um, the information we covered in the near pas that

I've actually thio remember?

As far as like, the the highlighted Ah, bold words

into your student notes.

I think you'll be fine.

Eso this This video actually help you out on the

multiple multiple choice section of the test, And I will

be sending you some information as to how you guys

will be assessed.

Basically, a short answer.

Remember the other day I mentioned that you be doing

something called flip grease for your short answer portion of

the Unit five assessment.

So I hope this helps.

And I hope you guys, uh, you know your home

and I hope you guys, you know, you realize everything

that you have there to help you do well in

Homeostasis and Cell Transport

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