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Introduction160-page2 - surroundings to grow and maintain...

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Introduction - 2 Response to Stimuli and Homeostasis Organisms constantly sense changes in their surroundings and make controlled responses to those changes. Organisms have specialized receptors that detect environmental stimuli, and their cells adjust metabolism in response to signals from receptors. This constant monitoring and interaction between cells and their environment is called homeostasis. Energy All organisms require energy input to maintain the processes of life. Living organisms must have the capacity to obtain and convert energy from their
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Unformatted text preview: surroundings to grow and maintain themselves. In biology this is known as metabolism. Growth and Reproduction All living organisms have a common molecular inheritance based on the nucleic acid, DNA. DNA contain the instructions for the structure and function of cells, the common structural component of living organisms. DNA guides growth, development and maintenance of tissues and organs of multicellular organisms. DNA instructions are passed from generation to generation (inherited) by the process of reproduction....
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