An excitatory message causes:

a. channels to open in the neuron's membrane that allow chloride ions to flow out
b. channels to open in the neuron's membrane that allow sodium ions to flow in
c. channels to open in the neuron's membrane that allow potassium ions to flow in
d. the neuron's sodium/potassium pump to be inactivated

B

Psychology

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McCulloch-Pitts neurons are:

A) neurons which will either fire or not (will be "on" or "off") B) very slow in firing C) made from artificial organic material and designed to work just as neurons in the brain D) those that are constantly on (as a computer is) E) in need of constant stimulation

Psychology