Cell Transport

Question 1

Living cells of both plants and animals are surrounded by a ——- called the ——

Answer 1

1. semi permeable membrane
2. plasma membrane

Question 2

What does the Plasma Membrane do in this process?

Answer 2

It regulates the flow of liquids, and dissolved solids and gases, in and out of the cell.

Question 3

What are the two different types of cell transport?

Answer 3

1. Active transport
2. Passive transport

Question 4

What is included in passive transport?

Answer 4

1. osmosis
2. simple diffusion
3. facilitated diffusion

Question 5

What is osmosis?

Answer 5

Osmosis is a special form of diffusion that involves the movement of solvent molecules (usually water).

Question 6

Can you explain the net movement of the water molecules in osmosis including the concentration

Answer 6

There is a net movement of water molecules from a solution with low solute concentration to a solution with a higher solute concentration, there will be no net movement as they are isotonic to each other across a semi-permeable membrane.

Question 7

What is Simple diffusion?

Answer 7

Simple diffusion is where there is passive movement of substances which do not use energy from a higher concentration to a lower concentration.

Question 8

A difference between concentrations is know as a ——

Answer 8

Concentration gradient

Question 9

What is an example of concentration gradient?

Answer 9

During gas exchange in the alveoli, oxygen moves from being at a higher concentration in the air to a lower concentration in the blood.

Question 10

What is Facilitated diffusion?

Answer 10

Facilitated diffusion involves molecules which are larger or charged. They can only move into or out of a cell with the help of membrane proteins, down a concentration gradient.

Question 11

What do Channel and Carrier proteins do during Facilitated diffusion?

Answer 11

Channel proteins open and close to allow specific substances through, and Carrier proteins aid transport across the membrane.