BIOL 120 Lecture 18: Biol 120 - Class #18
Document Summary
Structure of the parasympathetic division of ans. Cell bodies of parasympathetic preganglionic neurons in four cranial nerve nuclei in the brain stem + lateral gray horns of the s2-s4 segment of spinal cord (=cns origin of parasympathetic division) Parasympathetic preganglionic neurons synapse w/ postganglionic neurons in. Because they are located near or inside of visceral effectors terminal ganglia. Response of body to stimulation of the parasympathetic division of ans. Parasympathetic division regulates activities that conserve and restore body energy. Physiological response => rest and digest activities. An autonomic reflex adjusts the activities of smooth muscle, cardiac muscle, and. Receptor sensory neuron integrating center 2 autonomic motor neurons visceral effector. Responds to a stimulus => produces a change that triggers nerve impulses. Conducts nerve impulses from receptors to cns. Interneurons within cns relay signals from sensory neurons to motor neurons. Effectors = smooth muscle, cardiac muscle, glands. Reflex of these structure in response to motor impulse => autonomic.
