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Cells
Revision for the Year 7 Cells test
| Question | Answer |
|---|---|
| What are the seven life functions? (Mrs Gren) | Movement, respiration, sensitivity, growth, reproduction, excretion, nutrition. |
| What is a cell? | A cell is the smallest unit of life. |
| What is a unicellular organism? | A unicellular organism is an organism that is made up of just one cell. |
| Give an example of a unicellular organism. | Amoeba and Euglena are unicellular organisms. |
| Can you name parts of amoeba? | Amoeba has a nucleus, contractile vacuole, cell membrane, food vacuoles and pseudopods. |
| Name parts of Euglena. | Euglena has a flagellum, nucleus, chloroplasts, a contractile vacuole and an eye spot. |
| Name some differences between Amoeba and Euglena. | Amoeba has pseudopods and Euglena has a flagellum and chloroplasts. |
| What is a multicellular organism? | This is an organism made of many types of cell. |
| What advantages are there to being multicellular? | Multicellular organisms can be bigger and more complex. |
| How are cells organised in the body. | Cells are organised into tissues which are organised into organs, which then belong to organ systems. Organ systems are then organised into an organism. |
| What is an organism? | An organism is a living thing. |
| What is a microscope used for? | To magnify . |
| Name some differences between onion and cheek cells. | Onion cells have a more regular shape. Cheek cells are more irregular. |
| What similarities are there between plant and animal cells? | Plant and animal cells both have a nucleus, mitochondria, a cell membrane and cytoplasm. |
| What are the differences between plant and animal cells? | Plant cells have a rigid cell wall, a vacuole and chloroplasts. |
| What is meant by the term 'specialised cell'? | A specialised cell is one that is adapted for a specific function. |
| What does 'adapted to function' mean? | Adapted to function means having special features to do a job really well. |
| What are 'structural adaptations'? | Structural adaptations are special features that help a cell carry out its functions. |
| Name some specialised cells. | Some examples of specialised cells are: red blood cells, nerve cells, muscle cells, root hair cells, palisade cells. |
| What is the function of the digestive system. | The function of the digestive system is to break down and absorb food molecules. |
| What does the urinary system do? | The urinary system eliminates waste from the body. |
| What is the function of the circulatory system? | The function of the circulatory system is to transport substances around the body. |
| What does the respiratory system do? | The respiratory system replaces oxygen and removes carbon dioxide from the blood. |
| What substances do the circulatory system transport around the body> | The circulatory system transports oxygen from the lungs and glucose from the intestine. |
| Name some organs that are protected by the rib cage. | Heart and lungs are protected by the rib cage. |
| What are drugs? | Drugs are substances that affect the way the body works. |
| What does a nucleus do? | A nucleus controls the cell's activities. |
| What does the immune system do? | The immune system protects the body against infections. |
| What does the vacuole do in a plant cell? | A vacuole contains liquid to store substances in and it helps keep the cell rigid. |
| What is the function of the cell wall? | The cell wall helps keep the cell rigid. |
| What would happen to an organ if the blood supply to it was cut off? | An organ without a blood supply would not work because an organ needs oxygen to work. |
Created by:
Highcliffe Science
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