Unit 4 · 4.4 — Feedback [cite: 9, 13]

Everything to learn here

• Concept: Organisms constantly utilize feedback mechanisms to maintain homeostasis and respond dynamically to internal and external environmental disruptions [cite: 13, 40].
• Concept: Negative feedback loops act to return the physiological system to its target set point (e.g., mammalian temperature regulation, blood sugar control) [cite: 13, 14, 40].
• Concept: Positive feedback loops actively amplify physiological responses, driving the system further and further away from the initial set point until a climax is reached (e.g., fruit ripening, human childbirth) [cite: 13, 14, 40].
• Vocabulary: Homeostasis — the active, dynamic maintenance of a relatively stable internal physiological environment [cite: 13, 14, 40].

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