motor units Flashcards

1
Q

what’s a motor unit?

A

a motor neuron and a number of muscle fibers

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2
Q

whats a motor neuron?

A

specialised cells that transmit nerve impulses to groups of muscle fibers

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3
Q

CNS

A

central nervous system

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4
Q

whats a neuromuscular junction?

A

where axon’s motor end plates meet muscle fibers

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5
Q

all or nothing law

A

either all the muscle fibers contract or none of them do

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6
Q

what happens when the nerve impulse reaches the threshold charge?

A

all the muscle fibers in that motor unit contract with maximal force

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7
Q

synaptic cleft

A

the space between the motor end plates and the post synaptic membrane

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8
Q

neurotransmitter (ACH)

A

transmits action potential across the synaptic cleft

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9
Q

(ACH)

A

gets secreted in the synaptic cleft to transmit the nerve impulse to the muscle fibers

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