Homeostasis Worksheet
A Grade 12 Biology worksheet covering the principles of homeostasis, feedback mechanisms, and their importance in maintaining physiological balance.
Includes
Standards
Topics
Homeostasis: Maintaining Internal Balance
Name:
Date:
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Read each question carefully and provide concise, accurate answers. For multiple-choice questions, circle the best option. For fill-in-the-blanks, write your answer in the space provided. For short-answer questions, use complete sentences.
1. Which of the following best defines homeostasis?
The process of maintaining a constant internal environment.
The body's response to external stimuli.
The regulation of growth and development.
The breakdown of nutrients for energy.
2. Which component of a homeostatic control system detects changes in the internal environment?
Effector
Control Center
Receptor
Stimulus
3. A feedback loop works to reduce the effect of a stimulus, bringing the system back to its set point.
4. The maintenance of a stable internal body temperature is an example of .
5. When blood glucose levels rise, the pancreas releases to lower them.
6. Positive feedback loops are more common in the body than negative feedback loops for maintaining homeostasis.
True
False
7. The hypothalamus plays a crucial role in regulating body temperature.
True
False
8. Describe the general mechanism of a negative feedback loop and provide a biological example.
9. Explain why positive feedback loops are generally not used for maintaining long-term homeostasis.
Match the term on the left with its description on the right.
10. Effector
a. Responds to the control center's commands
11. Set Point
b. The ideal value for a physiological variable
12. Stimulus
c. A change in the internal or external environment
Use the words below to complete the sentences.
13. The process of maintaining stable body fluid concentrations is known as .
14. Maintaining the body's internal temperature within a narrow range is called .
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