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Living Environment
Topic 1: Similarities/ Differences among living cells
Question | Answer |
---|---|
Cell | The basic unit of structure and function that makes up all organisms |
Cell respiration | The process in which nutrients are broken apart, releasing the chemical energy stored in them |
Synthesis | A life process that involved combining simple substances into more complex substances |
Organelle | A structure within the cell that carries out a specific function |
Ribosomes | Tiny structures in the cell that are the sites of protein production |
Mitochondria | Pod-shaped organelles that contain enzymes used to extract energy from nutrients |
enzymes | Proteins that speed up the rate or chemical reactions in living things |
Chloloplasts | Green organelles that contain chlorophyll; where photosynthesis takes place |
Cell membrane | The thin boundary between the cell and its environment |
diffusion | The movement of molecules from areas of high concentration to areas of low concentration |
Active transport | The process by which cells use energy to transport molecules through the cell membrane from areas of low concentration to areas of high concentration. |
Amino acids | Any one of several building blocks of protein |
Receptor molecules | Certain protein molecules in the cell membrane that can receive chemical messages from other cells |
hormones | A chemical produced in the endocrine glands |