Which statement about muscle contraction is false?

a. The sliding filament model was developed by Hugh and Andrew Huxley.
b. Acetylcholine released into the synaptic cleft stimulates muscle contraction.
c. During contraction, the muscle length does not change, but the actin and myosin filaments
shorten.
d. Once the T tubules are depolarized, they open Ca2+ channels in the sarcoplasmic
reticulum.
e. Cross bridges are formed between myosin and actin during muscle contraction.


C

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