AP PSYCHOLOGY

Detailed explanation-1: -depolarizations. a change in the resting potential of a postsynaptic dendrite from-70mV to-72MV is called. an IPSP. hyper polarization is to depolarization as. inhibitory is to excitatory.

Detailed explanation-2: -Transmission of a signal within a neuron (from dendrite to axon terminal) is carried by a brief reversal of the resting membrane potential called an action potential.

Detailed explanation-3: -a voltage gradient. A change in the resting potential from-70 mV to-65 mV is called: depolarization. The repolarization of the neuronal membrane is largely due to the: opening of potassium channels, allowing the outflow of potassium.

Detailed explanation-4: -For example, if the neuron is at resting potential (-70mV) and the conductance to sodium increases, the membrane potential will be depolarized (it will move toward +55mV). When the conductance to sodium goes back to its original value, the membrane potential will return to the resting potential.

Detailed explanation-5: -Correct answer: Refractory period. Explanation: The refractory period, a phase in which action potentials cannot be fired, is the result of hyperpolarization, during which the membrane potential drops below –70mV.