Science Double Award - 4SD0 PearsonEdexcel

Movement Of Substances Into And Out Of Cells

Bayani Gaba-gaba

Cells are not sealed boxes. They constantly exchange substances with their surroundings, taking in what they need and removing what they do not. Three transport mechanisms make this possible: diffusion, osmosis and active transport.

In this lesson you will learn how each process works, what factors speed them up or slow them down, and how to investigate diffusion and osmosis in the lab. These concepts underpin gas exchange, nutrient absorption and water balance across the whole course.

Manufura

  1. Understand the processes of diffusion, osmosis and active transport by which substances move into and out of cells
  2. Understand how factors affect the rate of movement of substances into and out of cells, including the effects of surface area to volume ratio, distance, temperature and concentration gradient
  3. Investigate diffusion and osmosis using living and non-living systems

Takardar Darasi

Every cell is surrounded by a cell membrane that is partially permeable: it lets small molecules through but blocks larger ones. Three different mechanisms move substances across this barrier, and each one operates under different conditions. Getting clear on the differences between them is one of the most frequently tested skills in biology.

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Nazarin Darasi

Barka da kammala darasi akan Movement Of Substances Into And Out Of Cells. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

  1. Which process moves water molecules through a partially permeable membrane? A) Diffusion B) Active transport C) Osmosis D) Evaporation Answer: C
  2. What happens to an animal cell placed in pure water? A) It becomes turgid B) It becomes plasmolysed C) It may burst (lysis) D) Nothing happens Answer: C
  3. Active transport requires energy from which process? A) Photosynthesis B) Osmosis C) Diffusion D) Respiration Answer: D
  4. Which factor does NOT directly affect the rate of diffusion? A) Temperature B) Concentration gradient C) Colour of the solution D) Surface area Answer: C
  5. A plant cell placed in a concentrated salt solution will become: A) Turgid B) Plasmolysed C) Lysed D) Unchanged Answer: B

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Akwai a Android, Windows, macOS, da Linux

Akwai a cikin manhajar Green Bridge

Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

Cikakkiyar bayanan darasi tare da zane-zane
Mataimakiyar koyo da AI
Yi karatu ba tare da intanet ba, a kowane lokaci, a ko'ina
Akwai a Android, Windows, macOS, da Linux

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