Origin Of The Membrsne Resting Potentisln

Question 0

What ions have higher concentrations outside of the cell?

Answer 0

Sodium ion (Na+) calcium ion (Ca+) chloride ion (Cl-)

Question 1

What concentration inside the cell is higher than outside ?

Answer 1

Potassium ion (K+)

Question 2

What channel proteins are always partly open?

Answer 2

Potassium channel proteins

Question 3

What does Em stand for?

Answer 3

Membrane voltage caused by separation of charges

Question 4

What is the Em of a red blood cell ?

Answer 4

-10mv

Question 5

What is the Em of a motor nerve?

Answer 5

-80mV

Question 6

What is the Em of a skeletal muscle?

Answer 6

-50mV

Question 7

What is the ion that can freely move across the membrane when the cell is at rest?

Answer 7

Potassium ions (K+)

Question 8

What happens when potassium ions (K+)leave the cell?

Answer 8

The leave behind s immovable negative charge associated with large proteins in the cell

Question 9

What is the equilibrium potential ?

Answer 9

The balance point

Question 10

How do you get a greater resting potential?

Answer 10

The greater the differences in potassium ion (K+) concentrations inside and outside the cell

Question 11

Are sodium ions (Na+) involved in the resting potential ? Why ?

Answer 11

No because all sodium ion (Na+) channels are closed at rest so they can not move into the cell and change the balance of the charges there.