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Contractile vacuole Movie - PowerPoint PPT Presentation


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A living cell is put into a surrounding of 100% pure water ( most hypotonic !!) – Where would the water go? 2. What would be the problem for the cell? 3. How might the cell solve it? . J. Contractile vacuole Movie. Contractile Vacuole UC Davis. Passive and Active Transport

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Presentation Transcript
slide1

A living cell is put into a surrounding of 100% pure water (most hypotonic!!) –

  • Where would the water go? 2. What would be the problem for the cell?
  • 3. How might the cell solve it?

J.

Contractile vacuole Movie

Contractile Vacuole UC Davis

slide2

Passive and Active Transport

Across the Cell Membrane

slide3

Passive Transport

Transport DOWN the Concentration gradient:

From high to low.

1.Simple Diffusion

Example: Water , oxygen

2. Facilitated Diffusion

Example: Glucose, Ions

slide4

Diffusion:

Glucose cannot pass through

Osmosis

EQUILIBRIUM

Channels by Stolaf

Passive Active Transport!

Glucose

slide5

Facilitated Diffusion

Glucose Channels open in response to the hormone Insulin

EQUILIBRIUM

Glucose Transporter

Tutorial: Passive and Active Transport

slide6

Lets compare:

  • Diffusion (of oxygen, for exmaple)
  • 2. Osmosis
  • 3. Facilitated Diffusion
slide7

oC

-

Glucose

+

Comparing In terms of:

1.Direction

2.Energy Source

3. What’s moving?

4.Protein?

Osmosis

Diffusion

O2…

H2O

Notes

Facilitated Diffusion

slide8

Active Transport

Transport UP the Concentration gradient:

From low to high.

1. Pumps(Charged Ions)

2. Endocytosis(Large particles)

3. Exocytosis(Large particles)

Notes

slide9

Ion Pumps

Maintain a membrane potential with a more negative ions inside and more positive ions outside.

Transport Animation (password)

Active Transport Animation Tutorial

Pumps - by Stolaf

Na/K pump simple animation

slide10

Endocytosis

Endocytosis of LDL

Phagocytosis Simplified

slide11

Exocytosis

Exocytosis animation

slide12

Try yourself - Active or Passive?

Transport Animation (and more!)

Diffusion

Channel

Osmosis

Antiport

Symport

Symport

slide13

N

Transport of Proteins Inside the Cell: Vesicular Transport

Problem: How do we get a new protein from the center of the cell to the membrane?

?

Solution:

Vesicular Transport

Protein Transport - ER and Golgi