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What is homeostasis? Note one reason why it is important in the human body - Leaving Cert Biology - Question c - 2007
Question c
What is homeostasis? Note one reason why it is important in the human body. Draw a diagram of a section through human skin to show two structures involved in temper... show full transcript
Worked Solution & Example Answer:What is homeostasis? Note one reason why it is important in the human body - Leaving Cert Biology - Question c - 2007
Step 1
What is homeostasis? Note one reason why it is important in the human body.
Answer
Homeostasis is the maintenance of a constant internal environment in the body. This involves regulating factors such as temperature, blood pH, and glucose levels. One reason it is important in the human body is that it allows for normal metabolic activities to occur, ensuring that enzyme reactions happen at optimal conditions.
Step 2
Draw a diagram of a section through human skin to show two structures involved in temperature regulation. Label each of these structures.
Answer
A diagram is to be drawn showing the top layer of the skin, hair follicles, and sweat glands. The structures to label include:
- Sweat gland
- Hair
- Arteriole
Ensure that the diagram clearly depicts these components.
Step 3
For one of the structures that you have labelled in your diagram briefly describe its role in temperature regulation.
Answer
The sweat gland plays a significant role in temperature regulation. When the body's temperature rises, the sweat glands produce sweat, which evaporates from the skin surface. This process cools the body by dissipating heat, thus helping to maintain an optimal internal temperature.
Step 4
What is meant by an ectotherm?
Answer
An ectotherm is an organism whose body temperature varies with the environmental temperature. Unlike endotherms, which maintain a constant body temperature regardless of external conditions, ectotherms depend on external heat sources to regulate their body temperature.