Science Double Award - 4SD0 PearsonEdexcel

Excretion

Bayani Gaba-gaba

Every metabolic reaction in your body produces something useful, but many also generate waste that would become toxic if it were allowed to accumulate. Excretion is the process that removes these metabolic waste products and keeps your internal chemistry within safe limits.

This topic covers how carbon dioxide and oxygen arise as waste products of metabolism in plants and how they leave through stomata, as well as the roles of the lungs, kidneys and skin as excretory organs in humans.

Manufura

  1. Understand the origin of carbon dioxide and oxygen as waste products of metabolism and their loss from the stomata of a leaf
  2. Know the excretory products of the lungs, kidneys and skin (organs of excretion)

Takardar Darasi

You breathe out carbon dioxide with every breath. Your kidneys filter litres of blood each hour. Your skin secretes sweat even on a cool day. None of this is accidental: these are all forms of excretion, the removal of waste products made by metabolic reactions inside cells. Without it, toxic substances would build up, enzymes would stop working, and cells would die.

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Nazarin Darasi

Barka da kammala darasi akan Excretion. 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 of the following is an example of excretion? A) Passing faeces B) Exhaling carbon dioxide C) Vomiting food D) Sweating salt from food Answer: B
  2. Where is urea produced in the body? A) Kidneys B) Lungs C) Liver D) Skin Answer: C
  3. During the day, the main waste gas released by a plant is: A) Carbon dioxide B) Nitrogen C) Oxygen D) Water vapour Answer: C
  4. Through which structures do waste gases leave a plant leaf? A) Xylem vessels B) Phloem tubes C) Root hairs D) Stomata Answer: D
  5. Why is carbon dioxide removal important for the body? A) It makes blood too alkaline B) It dissolves to form acid, lowering blood pH C) It blocks oxygen from entering cells D) It causes dehydration Answer: B

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

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

Yi Aikin Tambayoyin Gwaji

Kana son yin aikin tambayoyin gwaji kan Excretion? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.

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