YV4-cells-4.5 Membrane transport Active Transport v4.Bio2

• Biologie
• Middelbare school
• vwo
• Leerjaar 4

Ch 4 Cells 

4.5 Membrane transport

Active Transport

Formative test tomorrow!

Cel ID cards

Answers posted in the classroom

Osmosis

takes account solute concentration

Examples of solutes are sugar or salt

Osmosis

Hypertonic (side of membrane with higher solute concentration)

Isotonic (solute concentration is in balance on both sides of the membrane)

Hypotonic (side of membrane with lower solute concentration)

Osmosis

Water potential  =  pressure potential + solute potential 

(exerting pressure raises the pressure potential)                                 

                                          (adding solute lowers the solute potential)

Water will travel from high to low water potential

                               

Active Transport

Active transport:

- against the flow 

- costs energy (ATP), which organelle?

Key words

Secretion

Endocytosis/Exocytosis/Phagocytosis

Active transport p. 93 & 94

• The cell invests energy 
• Often against the concentration gradient 
• For example:

       -Pumps in the membrane
       -Endocytosis

What is the 'movement of particles from their low to their high concentration' called?

1. osmosis
2. passive transport
3. diffusion
4. active transport

Copy the table to your notebook and fill in Yes or No

Answer sheet: Copy the table to your notebook and fill in Yes or No