Macon: Homeostasis, Feedback, & Cell Transport

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What is homeostasis?

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Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

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What is active transport?

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Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy in the form of ATP.

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What is passive transport?

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Passive transport is the movement of molecules across a cell membrane without the use of energy, typically moving from an area of higher concentration to an area of lower concentration.

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What is a feedback loop?

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A feedback loop is a biological mechanism in which the output of a system influences its own operation, often to maintain homeostasis.

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What is negative feedback?

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Negative feedback is a process in which a system responds to a change by initiating responses that counteract that change, helping to maintain stability.

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What is positive feedback?

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Positive feedback is a process in which a system responds to a change by amplifying that change, leading to an even greater response.

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What role does ATP play in cellular processes?

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ATP (adenosine triphosphate) serves as the primary energy carrier in cells, providing the energy needed for various cellular functions, including active transport.

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What is a pH buffer?

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A pH buffer is a substance that helps maintain a stable pH level in a solution by resisting changes in acidity or alkalinity.

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What is cell transport?

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Cell transport refers to the movement of materials in and out of cells, which can occur through passive or active mechanisms.

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What is osmosis?

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Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.