Bio Chapter 29 By: Ryan Bihasa

Central Nervous System

Central Nervous System

Nerve tissue that control the body's activities. It is made out of the brain and spine

Peripheral Nervous System

Peripheral Nervous System

All the nerves of the nervous system outside of the brain and spinal cord

Somatic Nervous System

Somatic Nervous System

one half of the two divisions in the peripheral nervous system associated with voluntary skeletal muscle movements. Contains sensory nerves and motor nerves

Autonomic Nervous System

Autonomic Nervous System

One half of the two divisions of the peripheral nervous system responsible for involuntary body functions such as breathing, heartbeat, digestion, etc.

-Parasympathetic

—Relating to Part of the ANS that counterbalances sympathetic nerves. It is made of the never arising from the brain and lower end of the spinal cord while supplying the internal organs, blood vessels and glands

-Sympathetic

—The other division of the ANS stimulates the body's fight-or-flight response

Sensory Neuron

Sensory Neuron

Nerve cells that are responsible for converting external stimuli of the organism into electrical impulses

Internueron

Interneuron

Nueron that transmits impulses between other neurons

Motor Neuron

Motor Neuron

Neuron who is located in the spinal cord and whose fiber projects outside the spinal to directly or indirectly control effector organs such as muscles and glands

Neuromuscular Disjunction

Neuromuscular Junction

A chemical synapse formed between a motor neuron and muscle fiber. This is the location where a motor neuron is able to transmit a signal to the muscle fiber causing muscle contraction

Acetylcholine

Acetylcholine

Acetylcholine is an organic chemical in the brain that acts as a neurotransmitter (a chemical released to send signals to other cells)

Norepinephrine and Epinephrine

Norepinephrine and epinephrine

Norepinephrine is also known as noradrenaline a hormone and a common neurotransmitter of the sympathetic nervous system - helps maintain blood pressure and increases during stressful times

Epinephrine is known as adrenaline, a hormone and a neurotransmitter - it helps us cope with stress by allowing us to breath easier by opening our airways and increases heart rate

Synapse

Synapse

A junction between two nerve cells. Impulses pass by diffusion of a nuerotransmitter over a minute gap

White & Gray Matter

White matter

Composed of bundles of myelinated nerve cell projections which connect areas of gray matter of the brain to each other and carry nerve impulses between neurons

Gray matter

Location of nerve cell bodies that connect with white matter areas to carry nerve impulses between neurons

Cerebral Cortex

Cerebral cortex

Outer layer of the cerebrum composed of folded gray matter and plays an important role in consciousness

Lobes of the Brain
Limbic System

Limbic system

The set of brain structures located on both sides of the thalamus also known as the paleomammalian cortex. Has a variety of control over functions such as emotion, behavior, motivation, long-term memory and olfaction

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