Page 111 - Biology_Form_3

Biology for Secondary Schools
Chapter

Five

Regulation
FOR ONLINE READING ONLY

Introduction

The ability of the organism to maintain a stable internal environment, is known
as homeostasis. It enables organisms to survive in different habitats and adapts
to changing conditions. To maintain homeostasis, the body requires a complex
regulatory mechanism for adjustment since both internal and external environment
of the cells keep on changing. In this chapter, you will learn about the mechanism
of regulation in the human body including temperature regulation, osmoregulation
and blood sugar regulation. The competencies developed will enable you to
maintain behaviours that promote body balance which in turn will help your
body maintain proper health.

Think temperature, water availability, and salinity
necessitate adaptive responses to maintain
homeostasis. The process of maintaining the
stable internal environment of an organism
Concept of regulation is called regulation or homeostasis. The

Task 5.1 internal environment refers to the immediate
surroundings of the cells comprising fluid
Search for information from the library called interstitial fluid which surrounds the
and internet sources on the concept of cell. The external environment refers to
regulation in human. Write short notes immediate surroundings of the organism
about the searched information. which may be marine, freshwater or

terrestrial. Biological processes are
Regulation is a fundamental biological regulated by various mechanisms including
process that enables organisms to the nervous system and hormonal system.
maintain internal stability despite external Therefore, regulation is a process that
environmental changes. It involves moderates the frequency, rate or extent
continuous monitoring and adjustment of of a biological process. Homeostasis on
body systems to ensure optimal functioning. the other hand is a regulatory procedure
Changes in external factors such as in living organisms for maintaining the

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