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11 Cards in this Set
- Front
- Back
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what happens during diffusion
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movement of materials form an area of high concentration to an are of low concentration
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what structures protect plant and bacterial cells from potential damage resulting from osmotic pressure
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channels in the membrane allow bacteria and plant cells to increase or decrease osmotic pressure and prevent bursting
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what is the difference between facilitated diffusion and active transport
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facilitated diffusion - is the movement of specific molecules across cell membranes through protein channels
active transport - energy requiring process that moves material across cell membrane against a concentration difference |
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what is the job of a protein channel in the cell membrane. give example
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allows for larger molecules to pass through the cell membrane
glucose molecules can't go through cell membrane, they go through protein channels |
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what is the difference between phagocytosis and pinocytosis
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phagocytosis is cell engulfing a solid particle and pinocytosis is a cell engulfing a liquid particle (cell drinking)
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what is the relationship between active transport and homoeostasis
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active transport is movement of molecules and ions across the cell membrane by protein pumps - homeostasis is how living things maintain balance between internal/external environment
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what is the difference between a unicellular organism and a multicellular organism
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unicellular (gen. prokaryotes) composed of one cell and are smaller in size.
multicellular (gen. eukaryotes) composed of many different cells |
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why do cells specialize
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they preform specific functions
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list and describe the levels of biological organization in multicellular organisms from most simple to most complex
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cells, basic unit of life - tissue, group of many cells to preform a certain function - organ, group of many tissues to preform certain function - organ system, group of organs to preform certain function
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how are unicellular and multicellular similar organisms
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both need/have nucleus
need genetic material cytoplasm cell membrane |
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which organelle is most common in muscle cells
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mitochondria
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