Question

Excretion is required for maintaining homeostasis of body fluids through regulation of their

• A. Volume, composition, pH and osmotic potential
• B. Volume
• C. Composition and pH
• D. Osmotic potential

Answer 1

The correct option is A Volume, composition, pH and osmotic potential

• Homeostasis is the state of steady internal conditions maintained by living things.
• This dynamic state of equilibrium is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range).
• Other variables include the pH of the extracellular fluid, the concentrations of sodium, potassium and calcium ions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Hence, Excretion is required for maintaining homeostasis of body fluids through regulation of their volume, composition, pH and osmotic potential.

So, the correct answer is 'Volume, composition, pH and osmotic potential'.