Chapter 29 Spark Page

Central Nervous System - the tissues that controls the activities of the body, some examples are the spine and brain

Peripheral Nervous System - the Nervous System outside the brain and spine.

Somatic Nervous System - the part of the peripheral nervous system associated with skeletal muscle voluntary control of body movements

Autonomic Nervous System - the part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes.

Parasymthetic - the part of the automatic nervous system that counterbalances the action of the sympathetic nerves

Sympathetic - the part of the autonomic nervous system that contains chiefly adrenergic fibers and tends to depress secretion

Sensory Neurons - neurons that convert a specific type of stimulus

Interneuron - a neuron that transmits impulses between other neurons

Motor Neuron - a nerve cell forming part of a pathway along which impulses pass from the brain or spinal cord to a muscle or gland

Neuromuscular Junction - a synapse between a motor neuron and skeletal muscle.

Acetylcholine - a compound that occurs throughout the nervous system, in which it functions as a neurotransmitter.

Norepinephrine and epinephrine - a hormone that is released by the adrenal medulla and by the sympathetic nerves and functions as a neurotransmitter

Synapse - a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.

White matter - the paler tissue of the brain and spinal cord, consisting mainly of nerve fibers with their myelin sheaths.

Gray matter - the darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites.

Cerebral cortex - the outer layer of the cerebrum (the cerebral cortex ), composed of folded gray matter and playing an important role in consciousness.

lobes of the brain - originally a purely anatomical classification, but have been shown also to be related to different brain functions.

Limbic system - a complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood

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