RRB RPF RPSF SI and CONS Model Papers 7 with solutions

(3) Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. It is through homeostatic mechanisms that body temperature is kept within normal range, the osmotic pressure of the blood and its hydrogen ion concentration (pH) is kept within strict limits, nutrients are supplied to cells as needed, and waste products are removed before they accumulate and reach toxic levels of concentration.