ANEQ 105 Lecture Notes - Lecture 8: Sensory Nerve, Metencephalon, Hydrocephalus
Document Summary
Components of the nervous system: sensory input, intergration, motor output. Functions: communication with internal and external environment, relay of electrical signals (impulses) to all parts of body. Divisions of the nervous system: central nervous system (cns) Includes neurons (nerve cells), blood vessels, connective tissues and support cells: peripheral nervous system (pns) Spinal nerves to and from the spinal cord. Cranial nerves to and from the brain. Pns is further divided into the sensory and motor divisions. Sensory nerve cells cells bodies located primarily outside of cns. Direction of travel: sense organs to spinal cord to brain. Signals move away from the cns to effector organs, glands, etc. Motor nerve cells cells bodies located primarily inside. Cns: somatic nervous system, autonomic nervous system. Largest and most numerous cells in body. Receive, transmit, and store information: types of neurons. Parts of neuron: cell body, nucleus, dendrites. Receive information from other neurons: axon.