Active transport,diffusion,osmosis,exchanging substances

Question 1

What is diffusion?

Answer 1

Diffusion is the movement of particles from a region of high concentration to low concentration, i.e. along a concentration gradient.

Question 2

What type of process is diffusion?

Answer 2

Passive process(doesn’t require energy)

Question 3

What is osmosis?

Answer 3

Osmosis is the diffusion of water molecules from a region of high water concentration(dilute solution) to a region of lower water concentration(concentrated solution) through a partially permeable(semi permeable) membrane(cell membrane)

Question 4

What type of process is osmosis?

Answer 4

Passive process (doesn’t require energy)

Question 5

What is active transport?

Answer 5

This is the movement of particles from a region of low concentration to a region of high concentration(i.e. against a concentration gradient) through a cell membrane(cell membrane has carrier molecules)

Question 6

What carrier molecules do cell membrane have?

Answer 6

The cell membrane has carrier molecules that mediate the movement of molecules that are too polar or too large to move across the membrane by diffusion. These carrier proteins bind specific molecules on one side of the membrane and allow them to pass through and be released on the other side.

Question 7

Net movement?

Answer 7

Particles moving in - particles moving out

Question 8

What are exchange surfaces?

Answer 8

Exchange surfaces are specialized surfaces in organisms that are adapted to maximize the efficiency of gas and solute exchange