Question

1. Consider four preparations, each with a chamber containing a mystery muscle fibre connected to a force transducer and a stimulating electrode. You are able to:

• Stimulate the muscle fibre and cause an action potential

Each of the four preparations contain a different type of muscle fiber:

• A slow-twitch skeletal muscle fibre
• A cardiac contractile cell
• A cardiac autorhythmic cell

Describe how you would go about determining which type of muscle fibre is in the chamber.

Answer 1

Here to detect the mystery muscle fibres first we have to examine the type of responses by those fibres.

Which can generate action potential with out any electronic supply is the autorhythmic cardiac muscle fibre. Because it contains SA node which can generate its own pulses.

Second which firbre will contract once as a whole means synchronised contraction or generation of the action potential via syncytials described cardiac contractile cell.

Lastly, which fibre will consume more time to catch electronic impluses but will continue to contract for a long time is a slow twitch fibre.