During voluntary movement, impulses descend from the motor strip to the spinal cord. Impulses stimulate muscles by way of
a. Ligaments.
b. Tendons.
c. Neurotransmitters.
d. Cartilage.
C
Through a complex process, neurotransmitters, or chemicals such as acetylcholine transfer electrical impulses from the nerve across the neuromuscular junction to the muscle. The neurotransmitter reaches a muscle and stimulates it. Ligaments are white, shiny, flexible bands of fibrous tissue that bind joints together and connect bones and cartilages. Tendons connect muscle to bone. Cartilage is nonvascular, supporting connective tissue located chiefly in the joints and in the thorax, trachea, larynx, nose, and ear.
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