82 out of 95
Chronaxie is minimum in?
|C||Red muscle fibres|
|D||White muscle fibres|
Ans. A Myelinated.nerve
- Chronaxie is the minimum time required for an electric current double the strength of the rheobase to stimulate a muscle or a neuron. Rheobase is the lowest intensity with indefinite pulse duration which just stimulated muscles or nerves.
- Chronaxie is dependent on the density of voltage-gated sodium channels in the cell, which affect that cell’s excitability.
- Chronaxie varies across different types of tissue: fast-twitch muscles have a lower chronaxie, slow-twitch muscles have a higher one. There is an inverse relationship between chronaxie and conduction velocity.