BIO SCI E109 Chapter Notes - Chapter 6: Somatosensory System, Enteric Nervous System, Autonomic Nervous System
28 Sep 2016
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1. binding of the extracellular chemical messenger (ligand) to a receptor (on the target cell) 2. signal transduction: signal transduction pathway involves several molecules in series. 3. cellular response: cell growth, pro synthesis, secretion, muscle contraction. 7. 1 overview of the nervous system: the nervous system is organized into the central & peripheral nervous system. Periphera l nervous system: process different kinds of incoming sensory information, the source of thoughts, emotions, and memories, produce signals that stimulate muscle contraction & glands secretion. Nerve: a bundle of axons that lies outside the brain and spinal cord. Sensory receptor cranial nerves: 12 pairs (from brain) spinal nerves: 31 pairs (from spinal cord) Afferent division : conveys input into the cns from sensory receptors. Efferent division : conveys output from the cns to effectors (muscles&glands) Motor neurons to cardiac and smooth muscle tissue, glands, adipose tissue. Sensory & motor neurons (consciously controlled, action is voluntary)
