nervous system Flashcards
roles of the nervous system
- generate and transport electrical impulses
- intergrate the received information
- stimute muscles for movement
-made up of the CNS and VNS
-a network of neurons
nervous system
generate electrical impulses (action potential)
neurons
-integrates and controls the behavior
-dense cluster of interconected neurons that process sensory info or control motor output
NERVE CELL BUNDLE
Segmental Ganglia
a bundle of dendrites or axons that serve the same part of the body
nerve
are typically found grouped in bundles
nerve cells
parts of the neuron
-nerve cell body (nucleus is found)
-dendrites (filamentous arborescent)
-axon (axis cylinder process)
-collaterals (derived from a main branch)
signal transmission is always
UNIDIRECTIONAL
toward - dendrite and collateral
away - axon
carry information towards the CNS
afferent or sensory neurons
conducts signals away from the CNS
Efferent or motor neurons
branching axons that conducts signals within the CNS
internuncial or interneurons
connection point of individual nerve cells
synapses
chemical messenger or neurotransmitter substance of synapses
acetycholine, dopamine, noradrenaline
consist of paired segmental ganglia
ventral nerve cord
a dorsal brain linked to a ventral nerve cord; supervises and coordinates activities of the insect
central nervous system
dense cluster of interconnected neurons that process sensory information or control motor outputs
ganglion/ganglia
a complex of 6 fused ganglia (3pairs)
brain
largely associated with vision;
innervates the CE and Ocelli
Protocerebrum
Process sensory information from the antennae
Deutocerebrum
Innervates the labrum;
Integrates sensory inputs for the pro and deutocerebrum;
and links brain with the rest of the ventral nerve cord
tritocerebrum
complex of fused ganglia innervating the rest of the mouthparts and also the salivary glands;
links the Brian and subesophageal complex
subesophageal ganglion
composed of a series of ganglia attached to one another by paired connective forming a kind of a chain
ventral nerve cord
ganglia that controls locomotion;
innervates legs and wings
thoracic ganglia
ganglia that controls the movement of abdominal muscles
abdominal ganglia
ganglia that innervates the anus, genitalia and sensory receptors
terminal abdominal ganglia
innervate the spiracles in the thorax and abdomen
Lateral nerves from segmental ganglion
innervates the activities fo the gut and the dv
visceral nervous system
innervates the pharynx and muscles for swallowing
frontal ganglion
innervates the heart, corpora cardiaca and portions of the foregut
hypocerebral ganglion
innervates the hindgut through GASTRIC NERVES
ingluvial ganglia
conveys an impulse from an arrival point along the axon to another neurons, muscle or gland, or from a receptor cell
axonic transmission
causes muscle contraction resulting to reflex reaction
synaptic transmission
involved in many life and death activities
reflex reaction
flow of electricity as produced by chemical reaction
galvanic twitch
coordinating center
brain
coordinating center for feeding;
receives information and control movement of MD, MX and labium
Subesophageal ganglion
