[Solved] Equivalent units are determined by multiplying physical units by the percentage of noncompletion. Medulla: the base of the brainstem; controls heartbeat and breathing. Erotic Plasticity: Refers to the degree to which an individual's sex drive can be changed by societal or situational factors. Refractory Periods: The period immediately following an action potential during which a neuron is incapable of activating a second action potential, ensuring that signals are sent in only one direction. Gender Typing: A child's development of awareness regarding their gender, leading to the assimilation of behaviors, values, and traits reflective of the gender they identify with.