Methods of transport across Membrane

Question 1

Diffusion

Answer 1

Movement of particles from an area of lower to higher concentration (Non-polar lipid)

• Move through pores along the concentration gradient
• With concentration gradient
• Passive transport

Question 2

Facilitated Diffusion

Answer 2

• With concentration gradient
• Passive transport
• Large particles (Glucose)
• Molecules diffuse across the plasma membrane with assistance from membrane proteins

Question 3

Osmosis

Answer 3

DIFFUSION OF WATER

• With concentration gradient
• Passive transport
• Water
• Diffusion of water across a membrane

Question 4

Active transport

Answer 4

Against concentration gradient
Active transport
All types of molecules
-Movement of particles across the cell membrane from an area of lower to higher concentration requires input of energy. ATP

Question 5

Endocytosis

Answer 5

With or against concentration gradient
Active transport
-Cells absorb external material by engulfing it with the cell membrane
-very large molecules

Question 6

Exocytosis

Answer 6

With or against concentration gradient
Active transport
-Cell releases material to external environment through changes in the cell membrane
-Very large particles