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Dendrites

The part of the nerve cell that receives information from the axons of other nerve cells.

Axon

The part of the neuron that carries the message away from the nerve cell to the dendrities on another nerve cell.

Myelin Sheath

Fatty covering around the axon that speeds up neural impulses

Neurotransmitters

Chemicals in the endings of nerve cells that send information across the synapse.

Synapse

The junction point of two or more neurons; a connection is made by neurotransmitters.

Cerebellum

The portion of the lower brain that coordinates and organizes bodily movements for balance and accuray.

Thalamus

The portion of the lower brain that functions primarily as a central relay station for incoming and outgoing messages from the body to the brain and the brain to the body.

Hypothalamus

The portion of the lower brain that regulates basic needs (hunger, thirst) and emotions such as pleasure, fear, rage, and sexuality.

Cerebral Cortex

The unit that covers the lower brain and controls mental processes such as thought.

Corpus Callosum

A large bundle of nerve fibers that transfers information from one half of the brain to the other.

Hemisphere

One-half of the brain; controls the opposite side of the body.

Frontal Lobe

Division of the brain that contains the motor strip and frontal association area.

Frontal Association Area

The forward portion of the brain that engages in elaborate associations or mental connections; it plays an important part in integrating personality and in forming complex thoughts.

Parietal Lobe

Area of the brain that contains the sensory strip.

Occipital Lobe

Area of the brain that interprets visual information.

Temporal Lobe

Area of the brain responsible for hearing and some speech functions.

Gonads

* The sex glands that make sperm or eggs for reprodcution

Metabolism

* The speed at which the body operates or the speed at which it uses up energy

Reflex

* An automatic behavior of the body involving movement activated through the spinal cord without using the higher brain.

Androgen

* The male sex hormone.

Estrogen

* The female sex hormone.

Sensory strip

* The rectangular band running down the side of the brain which registers and provides all sensation.

Glands

* Units of the body that contain the hormones.

reticular activating system (RAS)

* The alertness control center of the brain that regulates the activity level of the body.

Spinal cord

* Functions as an automatic "brain" in its own right and is a relayy station for impulses to and from the higher brain.

Dopamine

* A neurotransmitter that is involved in motor functions of movements.

Adrenaline

* The chemical that prepares the body for emergency activity by increasing blood pressure, breathing rate and energy level.

Neuron

* Nerve cell that transmits electrical and chemical information throughout the body.

Endorphins

* Neurotransmitters that relieve pain and increase our sense of well-being.

Motor strip

* The rectangular band running down the side of the brain that controls all motor functions.

Acetylcholine

* Neurotransmitter that regulates basic bodily processes such as movement.

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