QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
Which best defines homeostasis?
A. Modifying the external environment
B. Maintaining a stable internal environment
C. Controlling what enters and exits the cell
D. Movement of materials into the cell
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Answer
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Step 1:I'll solve this biology concept question step-by-step:
Step 2:: Understand the Term "Homeostasis"
Homeostasis is a fundamental concept in biology that refers to the ability of living systems to maintain a stable internal environment, despite changes in external conditions. This process is critical for the survival of organisms.
Step 3:: Analyze the Definition Components
Let's break down the key characteristics of homeostasis: - Involves internal conditions - Aims to keep conditions consistent - Occurs across different levels of biological organization (cells, organs, whole organisms)
Step 4:: Evaluate Each Answer Option
A. Modifying the external environment - Incorrect. Organisms respond to external environments, but do not fundamentally modify them. B. Maintaining a stable internal environment - CORRECT. This precisely defines homeostasis. C. Controlling what enters and exits the cell - Partially true, but not the complete definition of homeostasis. D. Movement of materials into the cell - This describes cellular transport, not homeostasis.
Final Answer
Maintaining a stable internal environment is the best definition of homeostasis. Key Insight: Homeostasis allows organisms to regulate critical parameters like temperature, pH, blood sugar, and other physiological conditions within narrow, optimal ranges necessary for survival.
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