Group 3

Question 1

what does surface area affect a cell

Answer 1

The larger a cell is, the smaller the surface area available for diffusion. Smaller cells have a much greater surface area to volume ratio allowing material to diffuse throughout the entire volume of the cell quickly and efficiently.

Question 2

Structure and function of the plasma membrane

Answer 2

to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules

Question 3

what are the 4 Modes of transport of soluble substances across the plasma membrane

Answer 3

simple diffusion, facilitated diffusion, osmosis and active transport

Question 4

define simple diffusion

Answer 4

the process in which a substance moves through a semipermeable membrane or in a solution without any help from transport proteins. high to low

Question 5

define facilitated diffusion

Answer 5

transport of substances across a biological membrane from an area of higher concentration to an area of lower concentration with the help of a transport molecule.

Question 6

define osmosis

Answer 6

the process of water moving to balance out concentration. Does not need energy

Question 7

define active transport

Answer 7

movement of molecules from a region of lower concentration to a region of higher concentration. low to high