Biology, 29.11.2019 05:31 barnettboy76
Myelination occurs quickly in humans during infancy, leading, e. g., to a child's fast motor development (crawling, walking -- those toddlers can move! ) as the speed of voltage pulses through their neurons increases with myelination of those nerve fibers. however, there are a number of neurodegenerative diseases, such as multiple sclerosis and
guillain- barre syndrome (which they mention when you get your flu shot), in which demyelination (loss of the myelin sheath insulating the nerves) occurs. the effective reduction of the membrane then leads to degradation or complete loss of nerve signals. if the capacitance of a membrane increases because of an effectively thinner membrane (degradation of the myelin sheath), but the resistances of the axon and its membrane do no change appreciably due to other effects, how would degradation of myelin affect the speed of a pulse?
a. the speed of a pulse would decrease.
b. the speed of a pulse would increase.
c. the speed of a pulse would remain the same.
Answers: 3
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Drag each label to the correct location on the image. each label can be used more than once. a scientist introduced mutations in a gene sequence isolated from bacteria. study the sequence, and identify the steps where the mutations may affect the formation of proteins. in the sequence, black letters stand for protein coding regions and red letters stand for noncoding regions. protein will not be changed. protein may be changed. attcgtgttc atcgtgttc atcgtattc attcgtattc
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Myelination occurs quickly in humans during infancy, leading, e. g., to a child's fast motor develop...
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