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Muscle Tissue and Gross Anatomy
|skeletal muscle; striated or non-striated?
|cardiac muscle; striated or non-striated?
|smooth muscle; striated or non-striated?
|which muscles are voluntary?
|which muscles are involuntary?
|cardiac and smooth muscle
|what are the characteristics of skeletal muscle?
|long, cylindrical, and multinucleated
|what are the characteristics of cardiac muscle?
|Y-shaped branching, and intercalated discs
|what are the characteristics of smooth muscle?
|small, spindle-shaped, and single nuclei
|what does 'striated' mean?
|refers to the alternating lines on the tissue (light/dark bands)
|what does voluntary refer to?
|having conscious control over the tissue
|what is the neuromuscular junction?
|it is the area where the nerve makes a connection with skeletal muscle
|what is action potential?
|the electrical current that runs through our nerves and muscles
|what is the somatic motor neuron axon?
|the extension of the nerve that carries an action potential to the skeletal muscle
|what is the axon terminal?
|the bulbous swelling at the end of the nerve that connects to the skeletal muscle. this is the part of the nerve that connects to the skeletal muscle
|what does terminal mean?
|where are the synaptic vesicles (transport sacs) located?
|within the axon terminal
|describe the synaptic vesicles (transport sacs).
|contain ACh, an excitatory neurotransmitter that diffuses from the nerve to the muscle and initiates the new action potential on the skeletal muscle.