Neural Transmission: Mechanism behind AP

Question 1

Cations

Answer 1

Positively charged

Question 2

Anions

Answer 2

Negatively charged

Question 3

Ion

Answer 3

charged atom with more or fewer electrons than usual

Question 4

What ions are in the fluid of neurons

Answer 4

-Organic anions (-)
-Sodium ions (Na+)
-Chloride ions (Cl -)
-Potassium ions K+

Question 5

Positively charged ions

Answer 5

Sodium and potassium

Question 6

Negatively charged ions

Answer 6

Chloride and anions

Question 7

Ions in intracellular fluid

Answer 7

Potassium and organic anions

Question 8

Ions in intracellular fluid

Answer 8

Sodium and chloride

Question 9

How do ions move in and out of cells

Answer 9

Electrostatic force and diffusion

Question 10

What happens when sodium ions are allowed into the cell

Answer 10

The membrane potential increases and becomes positively charged causing an action potential

Question 11

Voltage gated ion channel

Answer 11

When the threshold of excitation is reached, the channel opens to let ions into the cell changing the charge of the cell causing an action potential

Question 12

Sodium-Potassium-Pump

Answer 12

Causes sodium ions to move inside of the cell through diffusion increasing the membrane potential causing an action potential,
-3 sodium ions are transported out of the cell for 2 potassium ions let in, sodium ions are transported to the outside of the cell increasing the membrane potential and causing an action potential

Question 13

Refractory period

Answer 13

Period after an action potential occurs where it can’t fire again