The Nervous System 0.0 / 5 ? Nursingnervous system UniversityAll boards Created by: AmberJ1Created on: 29-04-17 11:56 Sensory function Sensory receptors detect stimuli and transfer it to the CNS 1 of 33 Motor function from the CNS to the effectors 2 of 33 Central nervous system contains the brain and spinal cord 3 of 33 Peripheral nervous system split into the autonomic and somatic nervous system 4 of 33 what's the difference between the autonomic and somatic NS? the autonomic NS is involuntary and the somatic NS is voluntary 5 of 33 What are the cells in the peripheral NS? Satiellite cells and schwann cells 6 of 33 What are the cells in the central NS? Ependymal cells, microglia cells, astrocytes and oligodendrocytes 7 of 33 What's the different structual classifications of neurons? BIPOLAR - one axon and one dendrite UNIPOLAR - more than one dendrite and one axon MULTIPOLAR - one axon and multiple dendritese 8 of 33 What is the myelin sheath? insulates the axons, it increases the speed of impulses 9 of 33 A cluser of neuronal cell bodies? CNS: Nucleus PNS: Ganglion 10 of 33 A bundle of axons? CNS: tract PNS: nerve 11 of 33 what is white matter? myelinated axons and blood vessels. Outside of spinal cord but inside the brain 12 of 33 What is grey matter? Unmyelinated axons, cell bodies. outside of the brain but inside the spinal cord 13 of 33 What is an action potential? rapid communication of electrical signals, nodes of ranvier (the gaps in the axons) increase the speed 14 of 33 Stages of the action potential https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Action_potential.svg/300px-Action_potential.svg.png 15 of 33 What is the gap between 2 neurons called? Synapse 16 of 33 When the presynaptic neuron becomes depolairsed, what channels open? calcium channels 17 of 33 Once Ca2+ channels open, what happens after? causes synaptic vesicles to fuse with presynaptic neuron and releases neurotransmitter, these bind to receptors and the action potential continues 18 of 33 What protects the CNS? Bone of the skull, meninges & CSF and blood brain barrier 19 of 33 What are the 4 main regions of the brain? Cerebrum, diencephalon, brain stem and cerebellum 20 of 33 what does the cerebellum do? balance, movement, motor learning, etc 21 of 33 What does the thalamus do? relays and processing centers for sensory information 22 of 33 What does the hypothalamus do? Controls emotions and hormone production 23 of 33 What does the epithalamus do? sleep, biological clock, contains pineal gland (secretes melatonin) 24 of 33 what does the midbrain do? processes visual and auditory data, maintance of consciousness 25 of 33 what does the pons do? relays sensory information to cerebellum and thalamus 26 of 33 what does the medulla oblongata do? relays information to thalamus and other parts of the brain stem and controls involuntary processes 27 of 33 What does the frontal lobe do? reasoning, planning, speech, movement and emotions 28 of 33 What does the parietal lobe do? movement, oreintation, recognition 29 of 33 What does the temporal lobe do? perception, auditory stimuli 30 of 33 What does the occipital lobe do? Visual processing 31 of 33 How many cranial nerves are there? 12, nerves directly from brain and brainstem 32 of 33 How many spinal nerves are there? 31: 8 pairs of cervical nerves, 12 pairs of thoracic nerves, 5 pairs of lumbar nerves, 5 pairs of sacral nerves and 1 pair of coccygeal nerves 33 of 33
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