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cell parts
| Question | Answer |
|---|---|
| Organelles | the general name of tiny cell structures that carry out specific functions within the cell. |
| Cell Wall | A rigid layer that surrounds the cells of plants and some other organisms, it protects and supports the cell. |
| Cell Membrane | controls which substances pass into and out of a cell |
| Nuclear Membrane: | the double membrane surrounding the nucleus within a cell. Also called the nuclear envelope. **Not in the textbook** |
| Nucleolus | small round structure in the nucleus where ribosomes are made. |
| Chromatin | thin strands of material that fill the nucleus, contains information for directing the cells function. |
| Nucleus | Control center of the cell, directs all of the cells activities. |
| Ribosomes | small grain-shaped organelles that produce proteins. |
| Cytoplasm | jelly-like substance that fills all the open areas in the cell. |
| Mitochondria | Rod-shaped structures that convert energy from food into energy for the cell, nicknamed the “powerhouse” |
| Endoplasmic Reticulum | The ER forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another. |
| Golgi apparatus | receives proteins and other newly formed materials from the ER, packages them, and distributes them to other parts of the cell or outside the cell wall. |
| Vacuole | stores water, food, and other materials needed by the cell, they can also carry waste products until it is removed. |
| Chloroplasts | captures energy from the sunlight and changes it to a form of energy cells can use in making food. |
| Lysosomes | Contains substances that break down large food particles into smaller ones. |
| Multicellular | Made of many cells |
| Unicellular | Made of only ONE cell |
| Specialized cells | Cells that are designed to do specific jobs that help the entire organism function. |
| Cells make | tissues, tissues make organs, organs make organ systems, organ systems make an organism. |
| Elements | any substance that cannot be broken down into simpler substances. |
| Compounds | when 2 or more elements chemically combine. |
| Organic compounds: | carbohydrates, lipids, proteins, and nucleic acids. Organic compounds must contain carbon. |
| Inorganic compounds | water. Inorganic compounds DO NOT contain carbon. |
| Carbohydrates | energy rich organic compounds made of carbon, hydrogen, and oxygen. Items that have sugar and starches would be carbohydrates. Examples: potatoes, pasta, rice, and bread. |
| Lipids | Fats, oils, and waxes. Examples: whole milk, ice cream, and fried foods. |
| Proteins: | large organic molecules made mostly of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. Examples: meat, dairy, fish, nuts, beans. |
| Enzymes | a group of proteins that helps speed up chemical reactions in living things. |
| Nucleic Acids: | Long organic compounds made of carbon, oxygen, hydrogen, nitrogen, and phosphorus. |
| DNA: | The genetic material that carries information about an organism and is passed from parent to offspring. Double Helix: Shape of the DNA molecule |
| Water in cells: | Water is needed for most chemical reactions in cells |
| Water in cells: | Water helps cells keep their shape. |
| Water in cells: | Water helps cells carry substances in and out of them |
| INTERPHASE | Chromosomes are copied (# doubles) • Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy (sister chromosome) change to sister chromatids at end of this phase |
| PROPHASE | Mitosis begins (cell begins to divide) • Centrioles (or poles) appear and begin to move to opposite ends of cell • Spindle fibers form between the poles |
| multicellular | made of many specialized cells |
| unicellular | made of only 1 cell |
| asexual | all or part of the organism is used to make a new organism, offspring are genetically identical to parent |
| sexual | two cells from different individuals combine to form the first cells of a new organism, traits are inherited from both parents |
| METAPHASE | Chromatids (or pairs of chromosomes) attach to the spindle fibers |
| ANAPHASE | Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell |
| TELOPHASE | Two new nuclei form • Chromosomes appear as chromatin (threads rather than rods) • Mitosis ends |
| CYTOKINESIS | Cell membrane moves inward to create two daughter cells - each with its own nucleus with identical chromosomes |
| Water in cells: | Water helps cells carry substances in and out of them |