Chapter Active and Passive Transport

ACTIVE AND PASSIVE TRANSPORT

4S1 – 27 Feb 2012

Sultanah Bahiyah National Secondary School

Lebuhraya Sultanah Bahiyah

05350 Alor Star

Kedah Darul Aman

Prepared by Muhammad Hafizuddin KamarudinB.Sc Biological Sciences (Hons)University of WarwickCV4 7AL Coventry, UK.

Learning Objective explain the movement of substances across the

plasma membrane through the process of active transport

explain the process of active/passive transport in living organisms using examples

compare and contrast passive transport and active transport.

Jerai Mt. expedition

Recap : Facilitated Diffusion Definition :- Transport of molecules - Across the plasma membrane- By process involves

- 1. Carrier protein ( certain type of molecules )- 2. Pore protein ( certain specific ions)

- Across concentration gradient

Facilitated diffusion

- 5 students please?

Activity 1

Video Simulation

facilitated diffusion.FLV

Active Transport

Definition

•Active transport-is movement of molecule or ions-against concentration gradient -across the plasma membrane

Properties

•Requirement of energy : ATP aka adenosine triphosphate•Require : Carrier protein•Type of molecule : Mineral ions , amino acids.•Transportation condition : Eliminate or accumulate of substance of cell.

Active Transport

- 8 + 1 students please?

Activity 2

Video Simulation

Sodium potassium pump

Sit in your group please

Describe the processes of passive and active transport in living organism?

Eg: Process : Active transport Type of molecules transported : Sodium Ions and

Potassium Ions Description : 1. By Carrier protein from outside to inside (Sodium ions) 2. By Carrier protein from inside to outside ( Potassium

ions)

Alveoli – Blood Capillaries – O2 – CO2

Villi – Blood Capillaries – Amino Acids - Glucose

Root Hairs – Soil Particles – Water

Root Hair - Soil particles – ions - ATP

Compare and Contrast between passive and active transport

The movement of substance

Against concentration gradient

Down concentration gradient

Active Transport Passive Transport

Cellular energy ?

Required Not Required

Active Transport Passive Transport

Location take place?

Living organism Living and non living physical condition

Active Transport? Passive Transport?

Close all ur books! =)

Worksheets Timeeee!

3.7 Answer Active transport is the movement of molecules or ions from a region of lower concentration to a region

of higher concentration across the plasma membrane with the use of cellular energy. Besides using energy in the form of ATP that is generated during respiration, active transport also

require carrier protein. The carrier protein has active site which binds with a particular molecule or ion and another active site

which binds to the ATP molecules. Active transport results in the accumulation or elimination of molecules or ions from the cells, i.e

equilibrium state is never achieved. Carrier proteins involved in active transport are often called pump because they operate just like water

pump which use energy to move water against gravity. In animal cells, the concentration of potassium ions inside the cells is always higher than the

concentration outside the cell. While the concentration of sodium ions outside the cells is always higher than the concentration inside the

cells. Carrier proteins are called sodium-potassium pumps that help to maintain the concentration gradients by

pumping sodium ions out of the cell and potassium ions into the cell. In plant cell, there is sodium pump mechanism in mangrove root.

3.8 Answer 23 41 Carrier protein P and ADP Shape Previous

3.9 Answer

Bye =P