The combination of cognitive and physiological states elicits psychological sexual arousal. Apoptosis occurs in many physiological and pathological processes. It has no physiological or biochemical action. Tachypnea may have physiological or pathological causes. Activation of prothrombin is crucial in physiological and pathological coagulation. Individual general anesthetics vary with respect to their specific physiological and cognitive effects. This overlaps with the biological approach of finding targets and physiological effects. Serine proteases are known to be involved in many physiological and pathological processes. Plants with such morphological and physiological adaptations are . Teratology is the study of abnormalities of physiological development. Stress management has physiological and immune benefits. The term relates to the increase in circulating levels of adrenaline during physiological stress. One of the first steps is to distinguish between physiological and psychological ED. Viktor Frankl believed depression occurred at the psychological, physiological, and spiritual levels. Evergreen and deciduous species vary in a range of morphological and physiological characters.