Biology chapter 29 Jeremy colorundo

Central Nervous System

In vertebrates, this is made up of the and spinal cord and is used to send sensory signals to the brain

Peripheral Nervous System

Nerves that extend from the central nervous system throughout the body make up this system

Somatic nervous system

A division of the peripheral nervous system which controls skeletal muscles and relays sensory signals about movements and external conditions

Auto in nervous system

A division of the peripheral nervous system that relays signals to and from internal organs and glands

Para sympathetic

a part of the autonomic nervous system these neurons encourage digestion and other common yet necessary tasks within the body


A part of the autonomic nervous system these neurons are activated in times of distress, such as when vertebrate is in danger

Sensory neuron

A neuron which its receptor endings detect aspect fix stimulus such as light or pressure


A neuron that both sends and receives signals to and from other neurons. They are located mainly in the brain and spinal cord

Motor neuron

A neuron which controls a muscle or a gland

Neuromuscular junction

A synapse between a neuron and a muscle


A chemical found in many animals including humans which is released by nerve cells to transmit signals

Norepinephrine and epinephrine

These hormones secreted by adrenal glands promote fight or flight response


The region where a neruon's axon terminals transmit signaling molecules to other cells

White matter

Central nervous system tissue consisting of mainly myelinated axons

Gray matter

Central nervous system tissue which consists of neuron axon terminals, cell bodies and dendrites as well as neurological cells

Cerebral cortex

The outmost portion of the cerebrum, it's a 2 milimeter thick layer of gray matter. Over the course of human history the layer has grown increasingly folded. These folds emable the brain to add additional gray matter while adding minimal space

Lobes of the brain

There are four lobes of the brain. They are frontal, parental, occipital and temporal. Each has its own purpose. Frontal controls voluntary movement. Parental is involved in sensory information and awareness of position. Occipital controls sight. Temporal controls sense of hearing smell memory thought and judgment

Lambic system

This set of structurally and functionally related structures deep within the brain gives rise to our emotions. This system includes the hippocampus which plays an essential role in the formation. Of declarative memories


Created with images by Double--M - "From the Brockhaus and Efron Encyclopedic Dictionary" • Double--M - "Central nervous system drawing circa 1900" • NICHD NIH - "Metastatic paraganglioma" • GreenFlames09 - "Brain Model 4" • jurvetson - "Upload"

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