Final answer:
The human internal environment refers to the conditions and processes within the body that are maintained by feedback mechanisms to ensure optimal function. It involves factors such as temperature, pH levels, and nutrient concentrations. Examples include thermoregulation and blood sugar regulation.
Step-by-step explanation:
The Human Internal Environment
The human internal environment refers to the conditions and processes that occur within the body to maintain a stable and optimal state for cells and organs to function properly. It is regulated by various feedback mechanisms and involves the maintenance of factors such as temperature, pH levels, and concentrations of nutrients and waste products.
For example, the body employs the feedback mechanism of thermoregulation to maintain a stable internal temperature. When the external temperature is too high, the body initiates sweating to cool down. On the other hand, if the external temperature is too low, the body shivers to generate heat.
Other feedback mechanisms in the body include maintaining blood sugar levels, pH balance, and electrolyte concentrations. These mechanisms help ensure that cells can carry out their functions optimally and respond to changes in the external environment.