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Nerves Heidi Martinez Period. 1 (Function of the nerves system, sensory…
Nerves
Heidi Martinez Period. 1
Function of the nerves system
sensory function- detects changes within the body and the outside body
Integrative function- analyze sensory information stores some aspects that makes decisions regarding appropriate behavior.
Motor function- responds to stimuli by irritating muscular contractions or glandular secretions
Major Division
Central Nervous System- It controls of most bodily functions, including awareness, movements, sensations, thoughts, speech, and memory
Peripheral Nerves System- It consists of the nerves and ganglia outside the brain and spinal cord
3 Types of Neuron Structure
1, Multi polar- many dendrites, one axon
Bipolar- one dendrites, one axon (sensory)
uni polar- fused axon and dendrite (sensory)
Nerve Covering
Types of Neurons
sensory neurons: transmit impulse to CNS (the spiral cord and brain ) from all parts of the body
Motor Neurons: transmit impulse away from CNS to defectors (2 kinds of tissue muscle)
Inter neurons or connecting: transmit impulse from sensory neurons to motor neurons
Nerve- bundle of peripheral axon in the PNS
Tract- bundle of central axon in the CNS
White Matter- tissue composed primarily of the myelinated axon
Gray Matter- tissue composed primary cell body/ unmeylinated
Nerve Covering-made up fibrous connective tissue
Endometrium- surrounds individuals within a nerve fiber
Perineum- surrounds a group of nerve fiber
5 Parts of Reflex Arc
1, Sensory Receptor- afferent nerve ending detects stimulus
sensory/afferent neuron- sends signals to CNS
3, Synapse/ Inter neuron integration center- connect between sensory neuron/ motor neuron
Motor/ efferent neuron- delivers response target
Efferent- target organ response to signal
Spinal Cord Structure/ Function
spinal Cord- connects between the brain/ brain stem to the rest of the body
Structure- white matter, made up of bundles of myelinate nerve fiber ,surrounds a butterfly shape core of gray matter housing inter neurons.
function: 1. to transmit impulse to and from the brain. 2. to house spinal reflexes.
4 major regions of the brain
1) cerebrum (cerebral hemisphere): largest portion/associated with higher mental function.
2) Deprecation: process sensory input/control many homeostatic process
3) Brain Stem: coordinates/regulate visceral
4) Cerebellum: coordinate muscular activity