New Ns

Question 1

Absolute refractory period is the period during which a second action potential :

Answer 1

Cannot be produced

Question 2

Relative refractory period is the period which the nerve :

Answer 2

Needs stronger stimulus

Question 3

Factors that increase excitability: any condition that increases Na+ permeability as :

Answer 3

Low extracellular Ca++ concentration

Question 4

Factors that decrease excitability: any condition that decreases Na+ permeability as :

Answer 4

High extracellular Ca++ concentration & Local anesthetics eg: cocaine

Question 5

Action potential is only generated at :

Answer 5

nodes of Ranvier

Question 6

action potential in one node acts as a stimulus for generation of new action potentials at the :

Answer 6

Adjacent nodes

Question 7

Saltatory conduction :

Answer 7

Jumping from one node to the next, It is faster.

Question 8

Conduction in Ummylienated: During the depolarization, a potential difference is created between the :

Answer 8

Stimulated area & Adjacent areas, it is Slower.