6 Questions
What is required to stimulate a skeletal muscle contraction?
An electrical impulse from the central nervous system
What is the function of the motor neuron in muscle contraction?
To transmit nerve impulses rapidly to a group of muscle fibres
What is the role of acetylcholine in muscle contraction?
To allow the electrical impulse to transmit across the gap in the synaptic cleft
What is the all or none law in muscle contraction?
The muscle fibre contracts only if the electrical impulse exceeds a certain threshold
What is the result of an action potential in a muscle fibre?
A wave of contraction down the muscle fibre
What is the location where the nerve impulse is initiated?
The brain or spinal cord
Learn how skeletal muscles contract, including the role of motor neurons and nerve impulses in the process.
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