Question

motor units - muscles are organized in functional groupings called motor units that contract using the all - or - none principle. 18. label the motor unit below: structure function axon dendrite synapse motor end plate action potential muscle fiber explain an example of a each type of motor unit - large - small -

Explanation:

Axon: Transmits electrical impulses away from neuron cell - body.
Dendrite: Receives electrical signals from other neurons.
Synapse: Gap between neurons for signal transmission.
Motor End Plate: Region where motor neuron contacts muscle fiber.
Action Potential: Electrical signal that travels along neuron or muscle fiber.
Muscle Fiber: Contractile unit of muscle.
Large motor units: Found in large muscles like quadriceps, used for powerful movements.
Small motor units: Found in muscles like those in fingers, used for fine - control movements.

Answer:

Structure	Function
Dendrite	Receives electrical signals from other neurons
Synapse	Gap between neurons for signal transmission
Motor End Plate	Region where motor neuron contacts muscle fiber
Action Potential	Electrical signal that travels along neuron or muscle fiber
Muscle Fiber	Contractile unit of muscle

Large: Quadriceps muscle motor units for leg - extension (powerful movement).
Small: Finger muscle motor units for precise finger - movements.