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BME 235 Nervous System I-III questions with 100- correct answers(100- accuracy)
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BME 235 Nervous System I-III questions with 100- correct answers(100- accuracy)
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BME 235: Nervous System I-IIIquestions with 100% correct
answers(100% accuracy)
Central Nervous System (CNS) - answer Spinal cord & brain
Peripheral Nervous System (PNS) - answer Nerves leaving spinal cord
(nerves & ganglia)
What are the major subdivisions of the PNS? - answer Sensory & motor
division
What the major subdivisions of the sensory and motor divisions? - answer
Visceral & somatic motor division
What are the major subdivisions of the visceral motor division? - answer
Sympathetic & parasympathetic division
In the PNS, axons are bundled into _____ and cell bodies are bundled into
_____. - answer nerves, ganglia
In the CNS, axons are bundled into _____ and cell bodies are bundled into
_____. - answer tracts, nuclei
Neurons can divided into three basic types, what are they? - answer
Sensory, Interneurons (association), Motor (efferent)
Sensory neurons: - answer conduct signals from receptors to the CNS
, Interneurons (association): - answer confined to the CNS
Motor (efferent) neurons: - answer conduct signals from the CNS to
effectors such as muscles and glands
Where are the interneurons located? - answer Lie entirely within CNS
connecting motor and sensory pathways (about 90% of all neurons)
Afferent - answer carry nerve impulses FROM sensory stimuli towards CNS
and brain (motor)
Efferent - answer carry neural impulses AWAY from CNS and towards
muscles to cause movement (sensory)
Structure & components of neuron: - answer
What are four types of neuroglia in the CNS? - answer Oligodendrocytes,
Ependymal cells, Microglia, Astrocytes
What's the most critical function of oligodendrocytes? - answer Form
myelin sheaths in CNS that speed signal conduction
What are the principle functions of astrocytes? - answer - Form supportive
framework
- Have extensions (perivascular feet) that contact blood capillaries and
stimulate them to form a seal called the blood-brain barrier
- Secrete nerve growth factors
- Communicate electrically with neurons
- Regulate chemical composition of tissue fluid by absorbing excess
neurotransmitters and ions
- Astrocytosis or sclerosis: when neuron is damaged, astrocytes form
hardened scar tissue and fill in space
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