Which of the following is not a necessary human life function?
a) metabolism
b) intelligence
c) responsiveness
d) excretion
e) movement
The Correct Answer and Explanation is:
The correct answer is b) intelligence.
Explanation:
Human life functions refer to the essential physiological processes that allow the body to maintain homeostasis and ensure survival. These functions are fundamental to the health and survival of the individual, and they include:
- Metabolism (a): This encompasses all chemical reactions within the body that are necessary for maintaining life. It includes catabolic reactions (breaking down molecules to release energy) and anabolic reactions (building molecules for growth and repair). Metabolism is critical for providing energy to cells, enabling them to perform their functions.
- Responsiveness (c): The ability to respond to stimuli from the environment is crucial for survival. This function allows organisms to react to changes, such as temperature, light, and other external factors, enabling them to adapt to their surroundings. Responsiveness is controlled by the nervous system and is key to maintaining balance in the body (homeostasis).
- Excretion (d): Excretion is the process of removing waste products from the body, such as carbon dioxide, urea, and other metabolic by-products. It is essential for maintaining internal balance (homeostasis), as waste accumulation can lead to toxic effects on the body.
- Movement (e): Movement includes both external and internal processes. It refers to the ability of an organism to move its body and limbs, as well as the movement of substances within the body, such as blood, food, and air. It is vital for interacting with the environment and for the proper functioning of organs and systems.
While intelligence (b) is an important cognitive function, it is not strictly necessary for human survival in the same way as the other functions. Intelligence involves the ability to learn, reason, and solve problems, but it is not a physiological requirement for life. In contrast, metabolism, responsiveness, excretion, and movement are vital life-sustaining functions that are directly involved in maintaining the biological processes necessary for survival.
Thus, intelligence, although valuable, is not classified as a necessary life function in the biological sense.