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Pearson - Human Physiology Chapter
- Questions and Answers | Latest
Version | 2025/2026 | Correct & Verified
Why is homeostasis important in the human body?✔✔ It maintains stable internal conditions despite external changes.
What organ system is primarily responsible for transporting nutrients and gases?✔✔ The circulatory system.
What does the term "internal environment" refer to in physiology?✔✔ The extracellular fluid that surrounds the body’s cells.
What is the smallest unit of life in the body?✔✔ The cell.
What is the role of the nervous system in maintaining homeostasis?✔✔ It detects changes and coordinates fast responses.
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What is the main function of negative feedback in homeostatic control?✔✔ To reverse a change and restore balance.
What is a tissue?✔✔ A group of similar cells performing a common function.
What is the main difference between intrinsic and extrinsic regulation?✔✔ Intrinsic occurs within an organ; extrinsic involves the nervous or endocrine system.
What is the term for a stable set point in homeostasis?✔✔ The normal range of physiological function.
What is an effector in a control system?✔✔ A structure that carries out the response to restore homeostasis.
What is the role of a receptor in a feedback system?✔✔ To detect changes in the internal or external environment.
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Why is positive feedback less common than negative feedback?✔✔ It amplifies changes instead of reversing them.
What is an example of positive feedback in the body?✔✔ Uterine contractions during childbirth.
What does a control center do in a feedback loop?✔✔ It processes information and determines the appropriate response.
How does the endocrine system help maintain homeostasis?✔✔ It releases hormones that regulate long-term body functions.
What are the four major tissue types in the human body?✔✔ Epithelial, connective, muscle, and nervous.
What is the primary function of epithelial tissue?✔✔ To cover surfaces and form protective barriers.
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