BIOL 204 Lecture Notes - Lecture 18: Circadian Rhythm, Retina, Genetic Variation
Document Summary
Peripheral nervous system: consists of the nerves and ganglia on the outside of the brain and spinal cord. Ganglia: a structure containing a number of nerve cell bodies, typically linked by synapses, and often forming a swelling on a nerve fiber. Effector: an organ or cell that acts in response to a stimulus. Ventricles: hollow part or cavity in an organ; the heart consists of a left and right ventricle; each of the four connected fluid-filled cavities in the center of the brain. Gray matter: the darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites; primarily associated with processing and cognition. White matter: modulates the distribution of action potentials, acting as a relay and coordinating communication between different brain regions. Neuron cell body: also called the soma, is the spherical part of the neuron that contains the nucleus.
