4941864
Descrição
FlashCards por Thomas Harris, atualizado more than 1 year ago
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Criado por Thomas Harris
mais de 8 anos atrás
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| Questão | Responda |
| name three parts of a animal cell | Cell membrane, Cytoplasm, Ribosomes, Nucleus or Mitochondrion |
| Name four types of organism whose cells have a cell wall and explain the function of this. | Plant, algae, bacteria, fungi Strengthens cell |
| Give the functions of the following... 1. Nucleus: 2. Cytoplasm: 3. Mitochondrion: 4. Cell membrane: 5. Ribosomes: | 1.contains DNA: controls activities of cell. 2.cellular reactions take place here. 3. releases energy during aerobic respiration. 4.controls passage of substances in and out of cell. 5.Site of protein synthesis |
| Give 3 things that can speed up the rate of diffusion. | Bigger diffusion gradient (Conc. Diff) Larger surface area Shorter diffusion distance Higher temperature |
| Give 3 special features of a sperm cell and explain how it helps the sperm function. | Lots of mitochondria – release energy so can swim to egg cell Long tail – to swim to egg Head tip containing enzymes – digest egg jelly coat |
| What is the function of root hair cells and how are they adapted? | To absorb water and nutrients. Large surface area – speeds up absorption (diffusion) |
| What is diffusion? | The net movement of particles in a liquid or gas from an area of high concentration to an area of lower concentration down concentration gradient |
| What is unusual about the genetic material in a bacterial cell? | Not inside a nucleus |
| Which organelle would you expect muscle cells to lots of and why? | Mitochondria Need energy for contraction |
| Beta cells in the pancreas make lots of insulin, which is a protein. What organelle would you expect to see in high numbers? | Ribosomes |
| What is the function of root hair cells and how are they adapted? | To absorb water and nutrients. Large surface area – speeds up absorption (diffusion) |
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