Term
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Definition
- Signals from both types of sensory receptors are relayed to CNS
- sensory neurons
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Definition
- signals are conveyed outward to the heart, blood vessels, and skeletal muscles
- motor neurons
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Term
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Definition
- help integration
- second class of neurons
- integrate sensory signals by relaying signals within the CNS
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Term
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Definition
- recieves and integrates incoming (sensory) signals and responds with outgoing (motor) command signals
- brain and spinal cord
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Term
| Peripheral Nervous System |
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Definition
- network of sensory receptors that detect internal and external environmental change, and nerves, that transmit information between the CNS and the periphery
- consists of nerves and sensory receptors
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Term
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Definition
- fan of nerves that the spinal cord breaks up into
- literally- tail of horse
- at the first or second vertebrae
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Term
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Definition
- most inferior part of the brain
- thumb-size piece of tissue that merges with the spinal cord
- serves as central clearing- house for nerve signals, relaying them to other parts of the brain and spinal cord
- integrates signals specific to several core physiological processes (sleep, breathing, bp)
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Term
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Definition
- posterior to brain stem
- fist-sized wedge of tissue that integrates signals in the regulation if body movement
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Term
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Definition
- superior to and branching from the brainstem
- originates as a single structure from the brainstem but quickly divides into two pecan-sized masses, one on each side
- contains the hypthalamus (hunger, thirst)
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Term
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Definition
- above the diencephalon
- provides maximum information assimilations and is home to the highest degree of integration, consiousness
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Term
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Definition
- connected to opposite sides of the body
- what the cerebrum is divided into
- each about the size and shape of a small boxer's glove
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Term
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Definition
- voluntary, conscious
- regulate the activity of skeletal muscles
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Term
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Definition
- involuntary, unconscious
- regulate the activity of the heart and viscera (internal organs)
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Term
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Definition
- carry message to the axon
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Term
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Definition
- a fatty whitish substance that is wrapped around axons to facilitate accelerated nerve impulse conduction
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Term
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Definition
- occurs in three forms: surface layer of the cerebrum, central core in spinal cord, small modules deep within the brain called nuclei
- where neuronal cell bodies predominate, the tissue is ____
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Term
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Definition
- Where axons are bundled together
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Term
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Definition
- small modules deep within the brain IN CNS
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Term
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Definition
- modules of cell bodies in PNS
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Term
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Definition
- bundles of axons in the CNS
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Term
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Definition
| Bundles of axons in the PNS |
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Term
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Definition
- most abundant glial cell
- starlike shape
- from a central cell body they send out numerous projections that grip and stabilize nerby neurons and capillaries, anchoring them in place
- also control the composition of the extracellular fluid by obsorbing and degrading neurotransmitters and excess ions
- serve as neuronal stem cells
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Term
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Definition
- literally- cells with fre dendrites
- synthesice the myelin sheath of CNS axons
- each covers short segments of multiple axons
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Term
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Definition
- Roaming scavenger cells- the phagocytes- of the CNS.
- engulf, digest, and destroy invading organisms and other foreign matter and clean up the debris of dead cells that remains after injury
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Term
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Definition
- line brain cevities called vetricles
- act as neuronal stem cells
- produce cerebrospinal fluid, a plasma-like liquid that cushions and protects movement of this fluid
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Term
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Definition
- major PNS glial cells
- forms the myelin sheath of the PNS axon
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Term
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Definition
- thin fibrous membrane that covers each axon in the nerve
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Term
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Definition
- fibrous membrane that covers bungles of axons (fascicles)
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Term
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Definition
- fibrous membrane that covers bundles of fascicles (nerve)
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Term
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Definition
- sheath the brain and spinal cord
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Term
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Definition
- outermost membrane
- a strong, thick, fibrous membrane that extends from the brain to the most inferior region of the vertebral column
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Term
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Definition
- middle meningeal membrane
- very closely lines the inner side of the dura mater
- thicker than pia mater, thinner than dura mater
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Term
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Definition
- an exceedingly thin membrane only a few cells thick
- tightly fitted over every prominence and depression in the irragular surface of the brain and spinal cord
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