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nervous system
nervous system break down
| Term | Definition |
|---|---|
| Autonomic nervous system | breaks down into sympathetic and parasympathetic nervous system |
| parasympathetic nervous system | slows everything down |
| sympathetic nervous system | arousing (fight or flight) fear |
| The central nervous system (CNS) | consisting of the brain and spinal cord |
| The peripheral nervous system (PNS | controls skeletal muscles voluntary movement |
| Autonomic nervous system (ANS), or visceral nervous system, | involuntary movement which controls smooth muscle, cardiac muscle, and glands; regulates responses to stress; and helps to maintain homeostasis |
| nervous system | detects and interprets and act on sensory information, |
| motor neurons | producing movement, cares messages from the brain to the spinal cord to muscles and glands |
| sensory neurons | cares information TO the brain and spinal cord |
| interneurons | only found only in the brain and spinal cord "your thinkers" A neuron located between a sensory and a motor neuron in a neural pathway |
| efferent nerve | carrying the messages from the brain and the spinal cord to the muscles, organs, and glands to activate movement. |
| dendrites | carries impulses toward the cell body. |
| axon | carries impulses away from the cell body. |
| Neurons, or nerve cells, | make up the conducting tissue of the nervous system |
| Neuroglia | are the cells that support and protect and nutrition the neurons (nervous tissue} |
| afferent nerves | carrying the messages to the brain |
| myelin sheath | A whitish, fatty substance that surrounds certain axons of the nervous system, it helps to transfer the message faster |
| associative neuron is also known as the | interneuron |
| efferent neurons transmit things to | muscle gland and organ |
| nerve fibers | are made up of neurons, caries electrical signal from the body |
| nerves | Individual neuron fibers are held together in bundles like wires in a cable that are part of the PNS |
| tracts | are called nerve fibers only when they are in the central nerves system . cannot repair its self do to no Schwann cells |
| Schwann cells | located only in the pns, they can protect and heal they are fixable wires in the pns |
| corpus callosum | largest nerve tract which joins the right and left hemispheres of the brain |
| synapse | is the point of contact between two neurons. |
| impulse | has to have a strong stimulation, the all or nothing rule. |
| child brain | developed in mother body at the earliest stage of 6weeks embryo |
| these ventricle will increase as you get older | cerebral ventricle |
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timya scales
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