Excretion In Humans
Muhtasari
Your cells are constantly making waste. Respiration makes carbon dioxide, and breaking down spare protein makes a poisonous substance called urea. If these waste products built up they would harm you, so the body has organs whose job is to remove them: this is excretion.
In this lesson you will learn what the lungs and kidneys excrete, name the parts of the urinary system, and (for the extended curriculum) follow how a kidney nephron filters the blood and reabsorbs what the body needs. You will also see how the liver makes urea from spare amino acids and why removing it matters.
Malengo
- State that carbon dioxide is excreted through the lungs
- State that the kidneys excrete urea and excess water and ions
- Identify in diagrams and images the kidneys, ureters, bladder and urethra
- [Supplement] Identify in diagrams and images the structure of the kidney, limited to the cortex and medulla
- [Supplement] Outline the structure and function of a nephron and its associated blood vessels, limited to: (a) the role of the glomerulus in the filtration from the blood of water, glucose, urea and ions (b) t he role of the nephron in the reabsorption of all of the glucose, some of the ions and most of the water back into the blood (c) the formation of urine containing urea, excess water and excess ions (details of these processes are not required)
- [Supplement] Describe the role of the liver in the assimilation of amino acids by converting them to proteins
- [Supplement] State that urea is formed in the liver from excess amino acids
- [Supplement] Describe deamination as the removal of the nitrogen-containing part of amino acids to form urea
- [Supplement] Explain the importance of excretion, limited to toxicity of urea
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Excretion In Humans. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which substance is excreted by the lungs? A. urea B. carbon dioxide C. excess ions D. glucose Answer: B
- Which tube carries urine from a kidney to the bladder? A. urethra B. ureter C. renal vein D. renal artery Answer: B
- Urea is made in the: A. kidney B. bladder C. liver D. lungs Answer: C
- In a healthy person, which substance is completely reabsorbed in the nephron? A. urea B. excess ions C. glucose D. water (all of it) Answer: C
- Deamination is the removal of the nitrogen-containing part of: A. glucose B. amino acids C. fatty acids D. glycogen Answer: B
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Vitabu Vinavyopendekezwa
Jifunze zaidi kutoka vyanzo huria
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Sehemu ya kitabu
The Kidneys and Osmoregulatory Organs
Explain how the kidneys serve as the main osmoregulatory organs in mammalian systems
"Biology: The Kidneys and Osmoregulatory Organs" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/41-2-the-kidneys-and-osmoregulatory-organs. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Sehemu ya kitabu
Nitrogenous Wastes
Compare and contrast the way in which aquatic animals and terrestrial animals can eliminate toxic ammonia from their systems
"Biology: Nitrogenous Wastes" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/41-4-nitrogenous-wastes. Access for free at https://openstax.org/books/biology/pages/1-introduction
Vimechapishwa na mashirika mengine chini ya leseni huria na vinatajwa kama wanavyoomba. Viungo hufungua tovuti zao.
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