Neuromuscular System Components and Functions

Identify the components of the neuromuscular system and their function in enabling the athletes to produce a fast start.

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Identify the components of the neuromuscular system and their function in enabling the athletes to produce a fast start. Fill in the blank: Transmit electrical information/signals away from cell body to the muscle _____

• axon

• dendrite

• synapse

• neuron

Identify the components of the neuromuscular system and their function in enabling the athletes to produce a fast start. Fill in the blank: Transmits electrical messages _____

• Nerves

• Muscles

• Bones

• Tendons

Identify the components of the neuromuscular system and their function in enabling the athletes to produce a fast start. Fill in the blank: The motor neuron receives signal to cause contraction (innervation/stimulation) _____

• innervation/stimulation

• relaxation

• inhibition

• deactivation

The 'All or None' Law in the context of muscle contraction and nerve function states that:

• a muscle fiber or nerve will respond completely or not at all to a stimulus.

• a muscle fiber or nerve will respond partially to a stimulus.

• a muscle fiber or nerve will respond only if the stimulus is above a certain threshold.

• a muscle fiber or nerve will respond in varying degrees depending on the stimulus strength.

The significance of motor unit size and number in muscle contraction is:

• Motor unit size and number determine the strength and precision of muscle contractions.

• Motor unit size and number have no effect on muscle contractions.

• Motor unit size affects only the speed of muscle contractions.

• Motor unit number affects only the endurance of muscle contractions.

Fibre recruitment is the process of activating different motor units in a muscle to produce a contraction. How does preferential recruitment occur in muscle contraction?

• By activating smaller motor units first, followed by larger ones as needed

• By activating larger motor units first, followed by smaller ones as needed

• By activating all motor units simultaneously

• By activating motor units in a random order

The role of frequency of impulse in muscle contraction and nerve function is to:

• initiate muscle contraction

• regulate the strength and duration of contraction

• prevent muscle fatigue

• control the speed of nerve signal transmission

Define 'all or none law'.

• The 'all or none law' states that a neuron either fires completely or does not fire at all.

• The 'all or none law' describes the gradual increase in response to stimuli.

• The 'all or none law' refers to the partial firing of neurons based on stimulus strength.

• The 'all or none law' is about the selective firing of neurons.

The relationship between motor unit size and number and force of muscle contraction is:

• Larger motor units and more motor units lead to stronger muscle contractions.

• Smaller motor units and fewer motor units lead to stronger muscle contractions.

• Motor unit size and number do not affect muscle contraction force.

• Only the number of motor units affects muscle contraction force.