Chapter 15 Part 1 Flashcards
Deals with functions and disorders of nervous system
Neurology
Brain and spinal cord
Central nervous system (CNS)
Connects CNS to effectors cranial and spinal nerves
Peripheral nervous system (PNS)
Bands of axons in PNS
Nerves
Nerves emerge from brain and spinal cord
Cranial and spinal
Groups of cell body in PNS
Ganglia
Sensory receptors
Monitor simuli
Processes sensory information
Integrative function
Carries information from CNS to effectors
Motor function
Sensory CNS carries information from CNS- motor portion carries information to skeletal muscles from CNS
Somatic nervous system (voluntary)
Sensory portion carries information from smooth cardiac muscles and glands to CNS
-motor portion carries information to smooth cardiac muscle and glands from CNS and consists of sympathetic and parasympathetic portion
Accotomic nervous system (involuntary)
Reduces emotional stress and quiet sympathetic division
Massage
Input portion
Dendrites
Contains nucleus and organelles such ribosomes,lysosomes and rough ER
Cell body
Output portion conducts nerve impulses
Axon
Moves materials in one direction; from cell body to axon
Axon transports slow
Moves materials in both directions to and from cell body
Axons transports fast
Structurally classified by number of processes and inclue -multipolar ; greater then 2 processes -bipolar- 2 processes -unipolar 1 process
Neuron types
Regulate homeostasis
Nervous and endocrine systems
Myelin sheath insulates axon increasing energy effiency and conduction speed
Mylenation
Myelin sheath gaps
Nodes of ranvier
Progressive automune disease that destroy myelin sheath of neurons -short circuits nerve impulses causing muscle weakness
Multiple scolorosis
Smaller and more numerous then neurons
Neurgolia
Produce myelin sheath around axons of PNS
Schwann cells (neuralgia PNS )