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liver.","mcqOptions":null},{"id":"f85bd2da-7a50-47e1-96bc-7639bec5e666","cardType":"basic","points":1,"front":"Which organs remove urea from the blood?","back":"The kidneys remove urea from the blood.","mcqOptions":null},{"id":"5fd4794d-b8df-4581-b426-443e57ef6122","cardType":"basic","points":1,"front":"Why are excess amino acids broken down?","back":"Excess amino acids cannot be stored as amino acids.","mcqOptions":null},{"id":"97254580-13ef-47dc-b1ad-1204d5f3bad4","cardType":"basic","points":1,"front":"What do dietary proteins produce when they are digested?","back":"Dietary proteins are digested into amino acids.","mcqOptions":null},{"id":"08daa446-13df-44fa-a7c6-cb5e54052076","cardType":"basic","points":1,"front":"Where are digested amino acids absorbed?","back":"They are absorbed into the blood.","mcqOptions":null},{"id":"90275f7b-3a45-4cf5-8c0e-0bce43daa2e0","cardType":"basic","points":1,"front":"What do cells use amino acids to make?","back":"Cells use amino acids to make proteins.","mcqOptions":null},{"id":"a5f793b5-b750-440f-8c0d-1f5b9bc1b489","cardType":"basic","points":1,"front":"What does the blood transport from the liver to the kidneys?","back":"The blood transports urea dissolved in plasma.","mcqOptions":null},{"id":"de42c7e5-7043-4239-bc55-269c2cc6f21d","cardType":"basic","points":1,"front":"Where is urea dissolved while it travels in the blood?","back":"Urea is dissolved in the plasma.","mcqOptions":null},{"id":"a8611001-3cc6-4a80-8bdd-8ca1d3077689","cardType":"basic","points":1,"front":"Where do the kidneys filter urea?","back":"The kidneys filter urea into the nephron.","mcqOptions":null},{"id":"6326bd0f-8c55-41cc-99bf-84ca895fd993","cardType":"basic","points":1,"front":"How does urea leave the body?","back":"Urea leaves the body in urine.","mcqOptions":null},{"id":"ee7a1a1e-cb99-40a2-b110-507a6d9f242e","cardType":"basic","points":2,"front":"What happens to nitrogen-containing waste from amino acid breakdown?","back":"It is converted into 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Excess amino acids are broken down by the liver.
Urea enters the blood and travels to the kidneys.
The kidneys remove it in urine.

","mcqOptions":null},{"id":"f9e03238-668c-4dd2-9c6d-0a3c1237bc1c","cardType":"basic","points":3,"front":"What happens to excess dietary protein from digestion to excretion?","back":"

Protein is digested into amino acids that enter the blood.
Cells use needed amino acids for protein synthesis.
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The kidneys remove urea in urine.

","mcqOptions":null},{"id":"f941c881-0713-4b2a-a4da-24a147833e4d","cardType":"cloze","points":null,"front":"Urea is a [ ].","back":"Urea is a nitrogen-containing waste substance.","mcqOptions":null},{"id":"596be0bf-fb55-4061-970f-a4f901d4d4d4","cardType":"cloze","points":null,"front":"An amino acid is a small molecule used to build [ ].","back":"An amino acid is a small molecule used to build proteins.","mcqOptions":null},{"id":"3feaad64-019d-48b5-9a24-9102bd380089","cardType":"cloze","points":null,"front":"The liver produces urea, while the kidneys [ ].","back":"The liver produces urea, while the kidneys remove it from the blood.","mcqOptions":null},{"id":"7d09c2b4-5a95-46ba-b087-e54acf45cbe2","cardType":"cloze","points":null,"front":"After production in the liver, urea enters the [ ].","back":"After production in the liver, urea enters the blood.","mcqOptions":null},{"id":"b6edd990-95c9-49c9-befa-5fd2e08f7f06","cardType":"cloze","points":null,"front":"The kidneys filter urea into the nephron so it can leave the body in [ ].","back":"The kidneys filter urea into the nephron so it can leave the body in urine.","mcqOptions":null},{"id":"8f9ab60e-546a-4420-8a17-bcb00a1c5e4b","cardType":"cloze","points":null,"front":"The sequence is excess amino acids, liver, urea, blood, kidneys, then [ ].","back":"The sequence is excess amino acids, liver, urea, blood, kidneys, then urine.","mcqOptions":null}]}],"examCountdown":{"examDate":"2027-05-11","paperLabel":"Paper 1"},"heading":"7.4.8 Production of urea in the liver","title":"7.4.8 Production of urea in the liver Flashcards","topbar":{"backHref":"/gcse/biology/edexcel/flashcards"},"topicSidebar":"$L38"}]}],"topicId":"e129f3d9-708e-417e-aed7-cc0b28e55d85","walled":"$L39"}],"$L3a","$L3b"]