AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
what is a dynamic equilibrium?
A
the balance of water and water on both sides. It is not isotonic
B
the balance of water and particles on both sides. It is isotonic
Explanation: 

Detailed explanation-1: -Cells isotonic to their surrounding solutions have an equal concentration of solutes in and out of the cell membrane. This creates a dynamic equilibrium that maintains the status of the cell.

Detailed explanation-2: -A cell in an isotonic solution is in equilibrium with its surroundings, meaning the solute concentrations inside and outside are the same (iso means equal in Latin). In this state there is no concentration gradient and therefore, no large movement of water in or out.

Detailed explanation-3: -What is the best dynamic equilibrium definition? Dynamic equilibrium occurs when, for a reversible reaction, the rate of the forward reaction equals the rate of the reverse reaction.

Detailed explanation-4: -The end result is an equal concentration, or equilibrium, of molecules on both sides of the membrane. At equilibrium, movement of molecules does not stop. At equilibrium, there is equal movement of materials in both directions.

There is 1 question to complete.