BIOLOGY
JAMB 2008 - Question 28
Biology 2008 JAMB Past Questions - Question 28: The transmission of impulses along a nerve fibre is characterized by
Choose the most appropriate option for the gap .
A:
B:
C:
D:
Correct Answer
B
Explanation
Impulse is in form of electricity (wave like motion) and it involves the migration of sodium ions from outside to inside of the nerve fibre (axonmembrane) and potassium ions from inside to the outside of the axon membrane. This results in the re-polarization orchange in potential difference along the nerve and moon. the fibre. Grand period of growth is th eperiod of an growth of an organism from the on-set up till the time the growth ceases(i.e. From lag to log to stationary phase). Hormone called acetyle choline helps the impulse to cross the synapse (gap between the sensory and intermediate neurorles) faster.
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