HI310 Lecture 3: Chapter-8-The-Spinal-Cord-and-Spinal-Nerves
24 Jan 2019
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Chapter 8 - the spinal cord and spinal. The cns includes the brain and spinal cord. The pns is made up of all the nerves outside the. It includes all the cranial nerves that carry impulses to and from the brain and all the spinal nerves that carry messages to and from the spinal cord. Any tissue or organ that carries out a command from the nervous system is called an effector, all of which are muscles and glands. The somatic nervous system is controlled voluntarily (by conscious will) and all its effectors are skeletal muscles. The involuntary division of the nervous system is called the autonomic nervous system, making reference to its autonomic activity. It is also called the visceral nervous system because it controls smooth muscle, cardiac muscle, and glands, much of which make up the soft body organs, the viscera. Dendrites are neuron fibers that conduct impulses to the cell body.
