Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Honors Biology

No description
by

John D'Agostin

on 28 September 2017

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Honors Biology

Cell Transport
The movement of materials
into or out of the cell through
the cell membrane
Diffusion
Diffusion refers to the process of molecules mixing as a result of their random motion
Osmosis
The net movement of water molecules through a semi-permeable membrane from a region of higher water concentration to an area of lower
water concentration

The direction that water moves tends to equalize the concentrations on the two sides of the membrane
Facilitated Diffusion
The process of spontaneous passive transport of molecules
or ions across a cell membrane
using imbedded proteins
Passive Transport
Does NOT require energy!
Active
Transport
Requires energy!
Honors Biology
Unit #3 Notes: Cell Transport

Examples
1. Diffusion
2. Osmosis
3. Facilitate Diffusion
Examples
1. Sodium-Potassium Pump
2. Endocytosis
3. Exocytosis
Sodium-Potassium
Pump

The process that pumps sodium out of
cells while pumping potassium into cells, both
against their concentration gradients. This
pumping requires energy and is needed for
cells to function properly
Endocytosis
Transportation of molecules (such as
proteins) into the cell by engulfing them
in an energy-using process
Exocytosis
Cells transport molecules (such as
proteins) out of the cell

Exocytosis and endocytosis are used
by cells because most substances important
to them are polar molecules that cannot
pass through the hydrophobic portion
of the cell membrane by passive
means
http://highered.mheducation.com/sites/0072495855/student_view0/chapter2/animation__how_the_sodium_potassium_pump_works.html
Full transcript