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20 Cards in this Set
- Front
- Back
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Main Functional brain areas
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Cerebrum
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Cerebrum
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Cerebral hemispheres seperated by fissure, outer surface gyrus with groves and sulci
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cerbral cortex, outler layer of cerebrum-surface
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gray matter, nerve cell ,
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below surface
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white matter, myelinated nerve fibers-white due to myleinationf ound on all nerve fibers. this myleination allows electrical signals to be carried by nerve fibers- no myelin, not able to carry a nerve impulse
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nerve fibers and hemispheres
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projection fibers connect the brain to the spinal cord, association fibers connect the gray areas
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cerbral hemispheres, each hemisphere controls function for contralateral side
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frontal lobe
parietal lobe temporal lobe occipital lobe |
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frontal lobe
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intellect, personality, motor cortex
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temporal lobe
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memory, hearing
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parietal lobe
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sensory cortex
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occipital lobe
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vision
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How do kidneys regulate acid base balance
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by differential secretion or reabsorption of H+ or HCO3-this takes days to kick in
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two mechanisms by which kidney controls acid base
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reabsorption of already filtered HCO3, acid prevention mechanisms
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dealing with Ph
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remember ph is based on H+,not necessarily HCO3- HCO3 combines with na to BUFFER acids, not to actually reduce ph because ph is a measurement of H+
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A-cells
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secrete to excrete a proton H+ and reabsorb HCO3- this actually happens more than B-cells, think about alkalinity of blood- more alkaline think about ph of blood 7.4
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B-cells
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secrete to excrete HCO3 and reabsorb H+
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3 things that figures show
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produce a new bicarb, trap a proton, prevent formation of an acid
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neurons or nerve cells
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excitable cells- can generate an action potential- have 2 obligatory requirements- glucose and oxygen
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supporting cells
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cannot generate action potential
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supporting cells
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astrocytes, microglia, ependymal, oligodnedrocytes, satellite cells, schwann cells
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astorocytes
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most abundant, anchors neurons and capillaries- makes sense because neurons must have capillaries to deliver oxygen and glucose,antigen presenting cells for immunity, controls chemical environment
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