Biology - 4BI1 PearsonEdexcel

Movement Of Substances Into And Out Of Cells

Bayani Gaba-gaba

Cells do not exist in isolation. They constantly exchange substances with their surroundings: taking in oxygen and nutrients, releasing carbon dioxide and waste products. Three transport mechanisms make this possible, and each works in a fundamentally different way.

In this lesson you will learn how diffusion, osmosis and active transport move substances into and out of cells. You will explore the factors that affect transport rates, discover why plants wilt and animal cells burst, and design practical investigations to observe these processes first-hand.

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

Substances cross cell membranes by three mechanisms: diffusion, osmosis and active transport. The first two are passive (they need no energy from the cell), while active transport requires energy from respiration.

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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 molecules from a region of lower concentration to a region of higher concentration? A) Diffusion B) Osmosis C) Active transport D) Filtration Answer: C
  2. Osmosis is best described as: A) The movement of any molecule down a concentration gradient B) The net movement of water from high to low water potential through a partially permeable membrane C) The movement of minerals into root hair cells D) The transport of glucose using carrier proteins Answer: B
  3. A plant cell placed in distilled water will become: A) Plasmolysed B) Crenated C) Turgid D) Lysed Answer: C
  4. Which factor does NOT affect the rate of diffusion? A) Surface area B) Colour of the cell C) Temperature D) Concentration gradient Answer: B
  5. Root hair cells contain many mitochondria because: A) They need energy for photosynthesis B) They need energy for active transport of mineral ions C) Mitochondria store water D) Mitochondria produce cell walls Answer: B

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

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Akwai a Android, Windows, macOS, da Linux

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