Solve

Guides

0

You visited us 0 times! Enjoying our articles? Unlock Full Access!

Question

Explain the following
Role of $N a^{+}$ in the generation of action potential

Open in App

Solution

Verified by Toppr

Sodium ions play an important role in the generation of action potential. When a nerve fibre is stimulated, the membrane potential decreases. The membrane becomes more permeable to Na+ ions than to K+ ions. As a result, Na+ diffuses from the outside to the inside of the membrane. This causes the inside of the membrane to become positively-charged, while the outer membrane gains a negatively charge. This reversal of polarity across the membrane is known as depolarisation. The rapid inflow of Na+ ions causes the membrane potential to increase, thereby generating an action potential.

Was this answer helpful?

10

Similar Questions

Q1

Explain the following
Role of

N a^{+}

in the generation of action potential

View Solution

Q2

Explain the following:

(a) Role of Na⁺ in the generation of action potential.

(b) Mechanism of generation of light-induced impulse in the retina.

(c) Mechanism through which a sound produces a nerve impulse in the

inner ear.

View Solution

Q3

Explain the following.

(a) Role of Na+ in the generation of action potential.

(b) Mechanism of generation of light-induced impulse in the retina.

(c) The mechanism through which a sound produces a nerve impulse in the inner ear.

View Solution

Q4

Fill in the correct sequence for generation of Action potential in a neuron

Stimulus ⟶Inflow of Na+ ions ⟶ ______⟶Repolarisation ⟶_________

View Solution

Q5

Fill in the correct sequence for generation of Action potential in a neuron

Stimulus ⟶Inflow of $N a^{+}$ ions ⟶ _(i)_____⟶Repolarisation ⟶___(ii)______

View Solution