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The number of muscle fibers in an individual motor unit can vary widely, typically ranging from a few fibers to several hundred, depending on the muscle’s function. Motor units in muscles responsible for fine motor control, like those in the hands, tend to have fewer fibers, while those in larger muscles, such as the quadriceps, may have many more. This arrangement allows for precise movement in smaller muscles and greater force generation in larger muscles.
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What is the relationship between the number of motor neurons recruited and the number of skeletal muscle fibers innervated?
Typically, hundreds of skeletal muscle fibers are innervated by a single motor neuron.Completed
What is a motor unit is made up of?
Motor neurons and the muscle fibers they transmit signals toA motor unit is a collection of muscle fibers that contract as a single functional unit when stimulated by an impulse from a motor neuron. The actual size can vary greatly, from many large muscle fibers in the quadriceps muscle group per motor unit to just a few muscle fibers in the muscles of the fingers per motor unit.
What is the difference between a motor unit and a motor neuron in the context of muscle movement?
A motor unit consists of a motor neuron and the muscle fibers it controls. The motor neuron sends signals to the muscle fibers to contract, while the motor unit refers to the combination of the neuron and the muscle fibers it innervates.
The combination of a neuron and the muscle fibers it associates with is called?
The combination of a neuron and the muscle fibers it associates with is called a motor unit. Motor units work together to produce movement by having the neuron stimulate the muscle fibers it innervates to contract.
Define motor unit?
A motor unit consists of a motor neuron and all the muscle fibers it innervates. When the motor neuron fires, all the muscle fibers in the motor unit contract simultaneously. This coordinated activation allows for precise control of muscle force and movement.
Would the ratio of motor neurons to muscle fibers be the greatest at the muscle that control the eye?
Yes, th ration of motor neurons to muscle fibers are greatest for the muscles that control eye.
What motor unit has the fewest muscle fibers?
One that isn't needed for precise movement. Muscles that need precise control have motor units with more muscle fibers.
A motor neuron and the muscle fibers it controls are called?
the motor unit
What motor neuron and all the muscle fibers it innervates called?
the motor unit
A motor neuron transmits signals to?
Muscle fibers
When a single neuron sends a strong enough impulse to a muscle that how many muscle fibers does it cause to contract?
When a single neuron sends a strong enough impulse to a muscle, it can cause multiple muscle fibers within that muscle to contract. The specific number of muscle fibers that contract will depend on factors like the size of the motor unit and the intensity of the signal from the neuron.
Once a motor neuron has fired all the muscle fibers in a muscle contract?
False
