Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 27

If a stimulus is strong enough to excite a neuron, two things happen to its axon. First, the stimulus will eventually open the axon's (a) _____. Second, after the gates are opened, the (b) _____ pump is stopped, and all the positive (c) _____ ions rush inside because they are attracted to the negatively charged protein ions. The rush of sodium ions inside generates a tiny electric current that is called the (d) _____. When this current is generated, the inside of the axon membrane changes to a (e) _____ and the outside changes to a (f) _____ charge.