Cell Transport

Chpt 3-2

Science Words and Objectives

Diffusion

Equilibrium

Osmosis

Passive Transport

Active Transport

Endocytosis

Excytosis

Explain the function of a selectively permeable membraneDescribe the process of diffusion and osmosisCompare and contrast passive and active transport- give examples

Diffusion

Movement of molecules from places where they are crowded together into places where there are fewer of them

Equilibrium

Equilibrium-When the substance is spread evenly throughout a space

Equilibrium-not available

on The internet

Osmosis

Diffusion of water through a cell membrane

http://www.biologycorner.com/bio1/diffusion.html

Types of transport

There are 2 types- passive and active transport

Passive Transport

The movement of particles across the cell membrane by diffusion is called passive transport- no energy is used to move the materials

Passive transport- not

Available on internet

Active Transport

When materials require energy to move through a cell membrane

Active transport-not

Available on internet

Endocytosis

The process by which cells transport a large body, such as a large protein molecule, thru a cell membrane into the cytoplasm

Exocytosis

A process in which a cell moves large molecules out thru the cell membrane

References

http://bio.winona.msus.edu/berg/ANIMTNS/At-an.htm

http://www.indiana.edu/~phys215/lecture/lecnotes/exoendo.html