A skeletal muscle fibre
belongs to book: MCQs & EMQs in Human Physiology|Ian Roddie, William F M Wallace|6th edition| Chapter number:-| Question number:264
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total answers (1)
belongs to book: MCQs & EMQs in Human Physiology|Ian Roddie, William F M Wallace|6th edition| Chapter number:-| Question number:264
total answers (1)
A. True This ‘resting membrane potential’ is about -90 mV.
B. True These are released on excitation.
C. False A single neurone supplies a group of muscle fibres.
D. True It becomes more excitable as its membrane potential approaches the firing threshold (about -70 mV).
E. False Decreasing extracellular Ca2+ increases excitability and may lead to spontaneous contractions (tetany), possibly by increasing sodium permeability.
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