[Solved] A market demand curve for labor shows the quantities of labor demanded by A)a particular firm in a specific labor market. B)all the firms in a specific labor market. C)a particular firm in various labor markets. D)all the firms in various labor markets. Erogenous Zone: Areas of the human body that are particularly sensitive to sexual stimulation. Sensate Focus: A sex-therapy exercise in which partners take turns pleasuring each other with guided verbal feedback and in which certain kinds of stimulation are temporarily forbidden. Autoerotic Zone: Areas of the body that provide sexual pleasure when stimulated, a concept often discussed in psychoanalytic theories of sexual development. Refractory Period: The period of time immediately following an action potential during which a neuron or muscle is incapable of generating another action potential.