BIOL 336 Lecture Notes - Lecture 21: Autonomic Nervous System, Sympathetic Ganglion, Autonomic Ganglion

• School: Emory University
• Department: Biology
• Course: BIOL 336
• Professor: Patrick Cafferty

Document Summary

Lecture 21: neurobiology vii - efferent pathways of the pns. Previously, we discussed the fact that efferent neurons have their cell bodies contained within the ventral horn of the spinal cord. These neuronal cells extend their axons outward through the ventral root to make connections with target cells: somatic. The cell bodies of these motor neurons are located in groups in the. These neurons release the neurotransmitter acetylcholine (ach) onto the target cells. Ach results in the excitation of skeletal muscle, leads only to contraction of skeletal muscles. There are no somatic neurons that inhibit skeletal muscles. Muscle relaxation involves inhibition of motor neurons in the spinal cord. Somatic motor neurons, extend axons to make connection with skeletal muscle cells. brainstem or the ventral horn of the spinal cord. Their large-diameter, myelinated axons leave the cns and pass without any synapse to skeletal muscle cells. Autonomic motor neurons, controls glands and muscles of internal organs.