Directions: Read the following passage and answer the given questions: 

Life is a state that is maintained by processes. The most sophisticated form of life is the human, and our thought focuses on the nature of the life and death of a man. Man demonstrates three lives or aspects of life: the life of the body—the physical, the life of the mind; and the life of the spirit. Physical life is the basis of existence; the mind contributes effectiveness and scope; and the spiritual entity contributes maximum living. Physiology: The existence of life is physically demonstrated by the presence of functions. Living tissues and organisms exhibit irritability: the ability to be excited by or detect stimuli and to respond thereto; growth and reproduction: which consist of the powers of multiplication and duplication, regeneration, and differentiation; adaptability: permitting both change and the maintenance of balances (homeostasis); and finally, and perhaps most characteristic of all, persistence. Metabolism: the transformation of energy and the use of materials. These properties, however, can be retained for a while by tissues after the death of the organism, so there is another mystery of life that we understand only in part. Life consists of structures and processes operating under integrative control. This integrative power is the unknown secret; we know it confers all life properties; the continuous flow of processes related to the organism's survival needs.