Suppose a neuron was at rest around -65mV when it was exposed to a neurotransmitter that caused the neuron to hyperpolarize. Which of the following could be effected of the neurotransmitter?
a. It increased K+ conductance
B. It opened Na+ channels
C. It produced an inward flow of positive ions and increased membrane potential, Vm
D. It increased the amount of positive charge in the neuron
Ans) a. It increased K+ conductance
Explaination:.hyperpolarisation is the state where the membrane potential of inside of axon become more negative as compare to outside due to late closure of K+ ion channel which eflux the K + ions from inside to outside of axon membrane creating more negative charge inside axon.
Opening of Na+ ion causes influx of Na+ insode ion which make inside of axon membrane lesa negative and on reaching thresold it develops action potential ie depolarisation of membrane.
Get Answers For Free
Most questions answered within 1 hours.