[Solved] Relative to skeletal muscle, smooth muscle A) only uses less energy to generate a given amount of force. B) only can sustain contractile force without fatigue. C) only uses calcium from the sarcoplasmic reticulum and extracellular space. D) uses less energy to generate a given amount of force and can sustain contractile force without fatigue. E) uses less energy to generate a given amount of force, can sustain contractile force without fatigue and uses calcium from the sarcoplasmic reticulum and extracellular space. Habituation: Decreasing responsiveness with repeated stimulation. As infants gain familiarity with repeated exposure to a stimulus, their interest wanes and they look away sooner. Erotic Stimulus: Any object, situation, or aspect of the environment that induces sexual arousal or desire. Romantic Fantasies: Imaginative thoughts or daydreams focused on idealized romantic ideals or relationships. Sex: In psychology, the biologically influenced characteristics by which people define male and female.