Saltatory Conduction Explained: Nerve Impulse Transmission Made Easy

Saltatory Conduction Explained: Nerve Impulse Transmission Made Easy

Question 1. Conduction of impulses in my elinated nerve fibers/ saltatory conduction.
Answer:

Node of Ranvier:

• It is a part of nerve fiber which is not covered by myelin sheath.

Saltatory conduction:

• Myelin sheath is impermeable to ions.
• Thus, sodium enter into nerve fibers from ECF only in the node of Ranvier and depolarization occurs.
• Depolarization occurs in successive nodes and action potential thus, jumps from one node to another node.
• This jumping is called saltatory conduction.

Question 2. Name any four mechanoreceptors.
Answer:

Question 3. Types of synapse.
Answer:

1. Anatomical classification:

2. Functional classification:

• Based on transmission of impulses.
  • Electrical synapse
  • Chemical synapse.