7. In normal adult skeletal muscle:

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7. In normal adult skeletal muscle:
a. the fibres are all less than 1 mm in length
b. each fibre is innervated by one the one neuromuscular junction
c. the neuromuscular junction is invariably found very close to the
proximal end of the muscle fibres
d. the potential difference (at rest) between the inside and outside of the fibre is 20 millivolts less at the neuromuscular junction than elsewhere in the fibre
e. the electrical changes in membrane potential between the inside and outside of a fibre during contraction are demonstable only at the myoneural junction

mark wrote:

7. In normal adult skeletal muscle:
a. the fibres are all less than 1 mm in length
b. each fibre is innervated by one the one neuromuscular junction
c. the neuromuscular junction is invariably found very close to the
proximal end of the muscle fibres
d. the potential difference (at rest) between the inside and outside of the fibre is 20 millivolts less at the neuromuscular junction than elsewhere in the fibre
e. the electrical changes in membrane potential between the inside and outside of a fibre during contraction are demonstable only at the myoneural junction

Answers:
a. false
b. true: each fibre is innervated by one motor neurone although each motor neurone can innervate multiple muscle fibres
c. false:
d. false: the nerves have a less negative potential difference but the whole muscle has a similar potential difference
e. false: can be demonstrated everywhere