Question

Neurons are excited because their membrane is ________ charged towards inner-side and _________ charged towards outer-side due to mainly _________ transport.

• A. Negatively, Positively, Passive
• B. Positively, Negatively, Passive
• C. Negatively, Positively, Active
• D. Positively, Negatively, Active

Answer 1

The correct option is A Negatively, Positively, Passive

Neurons are excitable cells because their membrane are in a polarised state. Different types of ion channels are present on the neural membrane which are selectively permeable to different ions, this creates a different in charge on either side of the membrane of a resting neuron. Neurons are excited because their membrane is negatively charged towards inner-side and positively charged towards outer-side due to mainly passive transport.

So the correct answer is 'Negatively, Positively, Passive'.