Q:

What do you call a motor neuron and all of the skeletal muscle cells it stimulates?

A:

Quick Answer

The University of Washington describes a motor unit as consisting of a somatic motor or efferent neuron and all the muscle fibers or cells it stimulates or innervates. An efferent axon reaches the muscle, where it forms branches and synapses with several muscle cells.

  Know More

Full Answer

Each efferent neuron, however, innervates or stimulates the muscle fiber to which it’s connected. The branching of individual motor axons within a muscle is essential because there are more muscle fibers than efferent neurons, according to "Neuroscience." The mechanism ensures muscle action is not compromised in the event that one or a few motor neurons are damaged.

Learn more about Molecular Biology & DNA

Related Questions

  • Q:

    What is a calf muscle strain?

    A:

    A calf muscle strain is the tearing of the muscle fibers at the back of the lower leg, according to Laurie LaRusso for NYU Langone Medical Center. The tear may be partial or complete. Muscle strains are graded according to their severity. Grade 1 is the mildest, and grade 3 is the most severe.

    Full Answer >
    Filed Under:
  • Q:

    Do brain cells reproduce?

    A:

    Some brain cells, in very select parts of the brain, do reproduce. Scientists discovered adult neurons in the hippocampus and ventricles of the brain are capable of cellular mitosis and transformation from progenitor cells, shattering the dogma that the number of adult neurons in the brain is fixed after birth.

    Full Answer >
  • Q:

    Why do plant cells have bigger vacuoles than animal cells?

    A:

    Plant cell vacuoles serve the same vital storage functions for nutrients, water and wastes as those in animal cells but are much larger because they also provide structural stiffness in combination with the plant's cell walls. This is why water-starved plants droop; their cells have essentially deflated. If a living but wilted plant once again receives sufficient water, it regains its former stiffness as the vacuoles refill.

    Full Answer >
  • Q:

    What do you call the chemical factors that determine traits?

    A:

    The chemical factors that determine traits are called genes. With the exception of less than 1 percent of genes, the rest of the genes in people are the same.

    Full Answer >

Explore