Question

When a threshold stimulus is applied to a muscle, the muscle fibres will contract fully or will not contract at all. This is known as:

• A. Sliding filament theory
• B. All or none principle
• C. Maximal oxygen uptake
• D. Contraction period

Answer 1

Answer: (B)

All or none principle

The all or none law states that the strength by which a nerve or muscle fiber responds to a stimulus that is independent of the strength of the stimulus. If that stimulus exceeds the threshold potential, the nerve or muscle fiber will give a complete response, otherwise, there is no response.

So, the correct option is 'All or none principle'.