Problem 5 - Anatomy and Physiology of Animals

Question

What is homeostasis?

Step-by-Step Solution

Answer

Homeostasis is the process by which organisms maintain a relatively stable internal environment, despite changes to external factors.

Step 1 - Definition

Homeostasis refers to the ability of an organism or environment to maintain a state of internal balance and physical wellbeing in spite of changes or outside factors. Successful homeostasis is vital to the survival of any living thing, and being able to maintain homeostasis even in adverse conditions is one of the most important evolutionary advantages.

Step 2 - Explanation

It involves maintaining the balance of several factors including temperature, pH, hydration, nutrient and ion concentrations in cells. It is achieved through systems of feedback and regulation mechanisms. For example, if the body becomes too warm, adjustments are made such as sweating to cool down. If glucose levels in the blood drop, the body will signal to eat food.