what is the nervous system? - ✔️✔️coordinated voluntary and involuntary actions and transmits signals to
and from different parts of its body
what is afferent (sensory)? - ✔️✔️- carry information about temperature, pressure, light and other stimuli
to the CNS
- specialized receptor converts stimulus to electrical energy
what is efferent (motor and autonomic)? - ✔️✔️- motor: control skeletal muscles
- autonomic: influences many internal organs (sympathetic and parasympathetic)
- usually have axon terminals or varicosities
- carry information away from CNS
what is apart of the central nervous system? - ✔️✔️- brain
- spinal cord
What is apart of the peripheral nervous system? - ✔️✔️- nerve tissue outside the CNS
- cranial nerves and branches
- spinal nerves and branches
- ganglia
- plexuses
- sensory receptors
what is in the afferent division? - ✔️✔️- somatic sensory
- visceral sensory
- special sensory
, what is in the efferent division? - ✔️✔️- somatic motor
- autonomic
what is a neuron? - ✔️✔️the basic signaling units of the nervous system
what is glia? - ✔️✔️communicate with neurons and provide important biochemical support
what is the cell body? - ✔️✔️- considered the control center
- processes that extend outward (dendrites and axon)
what are dendrites? - ✔️✔️receive incoming signals from neighboring cells
what are axons? - ✔️✔️carry outgoing signals from the integrating center to target cells
what is presynaptic terminals? - ✔️✔️contain transmitting elements
what are nerves? - ✔️✔️bundles of peripheral neurons
what is axon specialized for? - ✔️✔️to convey chemical and electrical signals that require a variety of
different types of proteins
what does the axon lack in? - ✔️✔️- lacks ribosomes and ER necessary for protein production
- therefore proteins must be produced in the cell body and transported down the axon
what makes a fast axonal transport? - ✔️✔️- membrane bound proteins and organelles (vesicles or
mitochondria)
what is the anterograde? - ✔️✔️cell body to axon terminal
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