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Tour of the Human Body Systems

The Tour Starts Here!

The Immune System
The Nervous System
The Excretory System
The Respiratory System
The Circulatory Syatem
The Digestive System
The Skeletal System
The Muscular System
Glossary of Terms
The Nervous System Vocabulary

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Acetylcholine: Chemical neurotransmitter in the brain and PNS

 

Action Potential: a conducted change in the membrane potential of excitable cells, initiated by a change in the membrane permeable to sodium ions

 

Autonomic Nervous System: Centers, nuclei, tracts, ganglia, and nerves involved in the unconscious regulation of visceral functions.

 

Axon: Elongate extension of  a neuron that conducts an action potential.

 

Brain: The main neurological headquarters of the body

 

Cell Body: The main center of the cell

 

Central Nervous System: Acts as a control center for the nervous system; processes information, and provides short term control over activities of other systems

 

Cerebellum: Posterior portion of the metencephalon, containing the cerebral hemispheres, including the cerebral nuclei, and cerebral cortex.

Cerebrum- The largest portion of the brain, composed of the cerebral hemisphere; includes the cerebral cortex, the cerebral nuclei, and the 'white matter'

 

Dendrite: part of the neuron that receives incoming messages

 

Ganglia: A collection of nerve cell bodies

 

Medulla Oblongata: All communication between the brain and the spinal cord involves tracts the go through this area of the brain

 

Meninges: Three membranes that surround the surface of the CNS

 

Mixed Nerve: nerves that contains sensory and motor fibers

 

Motor nerve: These are messenger cells for the CNS
 

Nerve impulse:  An action potential in a neuron cell membrane

 

Neuron: A cell in neural tissue specialized for intercellular communication by (1) changes in membrane potential and (2) synaptic communication

 

Neurotransmitter: Chemical compound released by one neuron to affect the membrane potential of another cell

 

Parasympathetic Nervous System: a division of the Autonomic Nervous system that controls nerves that are responsible for activities that conserve energy energy and lower the metabolism

 

 Peripheral Nervous System: All communication between the body and the CNS occurs through the Peripheral N.S.

 

Reflex: A rapid, automatic response to a stimulus

 

Response: How a cell body reacts to a stimulus

 

Resting Potential: The membrane potential of a normal cell under ideal circumstances

 

Sensory Nerve: Conveys information from both the external and internal environments to other neurons inside the CNS.

 

Sodium-Potassium pump: This is a pump within individual cells that allows homeostasis within the cell by ejecting sodium ions and taking in Potassium ions

 

Spinal Cord: The spinal cord is the area of the body that receives messages from the brain and sends them throughout the body

 

Stimulus: A change in the environment that produces a change in cellular activities

 

Sympathetic Nervous System: The second division of the Autonomic N.S responsible for fight or flight responses primarily responsible with the elevation of the metabolic rate and increases alertness

 

Synapse: the part of the cell that allows it to communicate to other cells

 
 
 

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