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Understanding Cell Structures and Functions: A Guide for 7th Grade Students

This educational resource is designed for Mrs. Reich’s 7th-grade class to explore cell structures and their functions through interactive stations. Students will learn about organelles, cell membranes, osmosis, and photosynthesis, reinforced by visual aids. Activities include identifying major cell components, understanding diffusion processes, and differentiating between plant and animal cells. This hands-on approach encourages critical thinking and engages students in the fascinating world of biology.

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Understanding Cell Structures and Functions: A Guide for 7th Grade Students

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  1. Stations on the Cell. Mrs. Reich’s Class standard 7-2.1 and 7-2.2

  2. Station 1 • What are the major structures of the cell called? • Organs • Organelles • Cell stuff • Tissue 2. Many organelles are too small to be seen without the aid of a _________________? • book • glasses • microscope • Partner 3.Look at the picture, what is the gel-like fluid inside of the cell called, suspending the organelles? • Plasma • Nucleus • Vacuole • Cytoplasm http://nobelprize.org/nobel_prizes/medicine/laureates/1999/med-cell-e.gif

  3. Station 2 • The thin, flexible outer covering of a cell which controls what enters and leaves is called the? • Cilia • Cytoplasm • Cell membrane • Cell wall • The picture to the right shows what function of the cells membrane? • Osmosis • Diffusion • Leaking • Selective choice 3. _____________is the diffusion of water across a membrane? • Diffusion • Tea bag Syndrome • Osmosis • Cell membrane http://wpcontent.answers.com/wikipedia/commons/thumb/c/cc/Scheme_simple_diffusion_in_cell_membrane-en.svg/626px-Scheme_simple_diffusion_in_cell_membrane-en.svg.png

  4. Station 3 • What is the control center of the cell and holds the genetic material? • Vacuole • Nucleus • Cytoplasm • Egg 2. ____________ acts as the temporary storage center and stores water, waste and water. • Vacuole • Nucleus • Cell membrane • Chloroplast • Look at the picture to the right, It is the site of photosynthesis and contains the chlorophyll used to make food. It is called the? • Vacuole • Mitochondria • Chloroplast • Cell wall http://www.rkm.com.au/CELL/Plant/plantcellimages/chloroplast.jpg

  5. Station 4 • Where is the site of respiration, and is known as the “powerhouse” of the cell? • Chloroplast • Mitochondria • Cell wall • Nucleus • The picture to the right provides support and shape for the plant cell, and is made of cellulose. What is it called? • Chloroplast • Cell wall • Cell membrane • Nucleus http://biology.unm.edu/ccouncil/Biology_124/Images/cellwall.jpeg

  6. Station 5 True or False • All cells have a cell membrane._____________ • All bacteria have a nucleus.____________ • Only plant cells have chloroplasts.___________ • Some bacteria have cell walls._____________ • The picture below is a picture of an animal cell_________.

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