Magic Grandad "Entertainment" or billed "The Pier" on 31 January 2001 which starred Miriam Margolyes as Grandmama. Magic Grandad Magic Grandad was an educational programme which originally aired on the BBC Two Schools section Watch during 1995. The show saw Magic Grandad, played by Geoffrey Bayldon, take his young grandchildren, played by Kristy Bruce and James Moreno, back in time to see historical events and people such as the Great Fire of London or Florence Nightingale. Cheryl Hall also starred in the show as the children's mother. The programme was said to make learning about history "fun for youngsters" and was aimed
All-or-none law contraction is not increased if the stimulus strength is further raised. Stronger stimuli bring more muscle fibres into action and thus the tension of a muscle increases as the strength of the stimulus applied to it rises. All-or-none law The all-or-none law is the principle that the strength by which a nerve or muscle fibre responds to a stimulus is independent of the strength of the stimulus. If that stimulus exceeds the threshold potential, the nerve or muscle fibre will give a complete response; otherwise, there is no response. It was first established by the American physiologist Henry Pickering Bowditch