Explain transport systems in cell

Question 1

What is simple diffusion?

Answer 1

Simple diffusion is the movement of particles from a region of higher concentration to a region of lower concentration down the concentration gradient

Question 2

What are the factors that can affect diffusion!

Answer 2

Concentration gradient, particle size, temperature ,surface area

Question 3

What is facilitated diffusion?

Answer 3

Facilitated diffusion is molecules diffuse across the plasma membrane with assistance of membrane proteins such as channel and carrier proteins

Question 4

What are channel proteins?

Answer 4

Channel proteins are proteins that have the ability to form hydrophilic pores in the cell membrane they transport molecules down to concentration gradient

Question 5

What are carrier proteins?

Answer 5

Carrier proteins are integral proteins they can transport substances across the membrane both in the direction of an against a concentration gradient.

Question 6

What type of molecules require facilitated diffusion?

Answer 6

Large molecules like glucose and charge molecules like ions

Question 7

What is osmosis?

Answer 7

Osmosis is the movement of water molecules from a region of higher water potential to an area of lower water potential across a partial Pemble membrane.

Question 8

What does hypotonic hypertonic and isotonic mean?

Answer 8

• Hypotonic means low solute concentration more water
• hypertonic means high solute concentration less water
• isotonic mean equal concentrated

Question 9

what is active transport

Answer 9

active transport is the movement of particles against the concentration gradient from an are of low concentration to an area of high concentration.