Chapter 8&9: Nervous System Flashcards
Two divisions of the nervous system
Central and peripheral
Two functional divisions of the PNS
Somatic and autonomic
The functional cells of the nervous system
Neurons
Two kinds of fibers that extend from the neuron cell body
Dendrites and axons
Any tissue or organ that carries out a nervous system command
Effector
Which is not how skeletal muscles can function without conscious control
Training heart rate (breathing, relflex, blinking)
Three types of neurons include all except
Cardiac (sensory, inter neurons, motor)
Bundles of neuron fibers in the PNS
Nerves
3 primary branches of spinal nerves that form plexuses include all except
Thoracic (cervical, brachial, lumbosacral)
Examples of neurotransmitters include all except
ATP (dopamine, serotonin, epinephrine)
Link between the brain and spinal nerves
Spinal cord
Regions of the body supplied by a single spinal nerve
Dermatomes
Which division of the nervous system controls skeletal muscles
Somatic nervous system
Primary role of nervous system includes all except
Transport nutrients and remove waste
Part of the neuron that carries impulses to the cell body
Dendrites
Part of the neuron that carries impulses away from cell body
Axons
The brain stem includes all except
Cerebellum (pons, midbrain, medulla oblongata)
The little brain located beneath the posterior part of the cerebral hemisphere
Cerebellum
Which is not a diagnostic test for the brain
RAS (EEG, PET, MRI)
Some axons are covered by this insulation and layer of protection
Myelin
Neurons make up about ___% of our nervous tissue
10
Neuroglia that forms myelin sheath in the PNS
Schwann cells
The pathway for sensory and motor impulses to and from the brain
Spinal cord
Specialized electrical signals or nerve impulses
Action potential
Branch of nervous system that promotes fight or flight response
Sympathetic
How many pairs of cranial nerves in the body
12
How many pairs of spinal nerves in the body
31
Regions of sensory neurons on the skin supplied by a single spinal nerve
Dermatomes
The brain and spinal cord make up the ___ nervous system
Central
