The Kidneys

    Cards (26)

    • What should you be able to describe by the end of this video?
      The ways water leaves the human body
    • What is the role of the kidney in the body?
      Maintaining the concentration of substances in blood
    • What should higher tier students explain regarding amino acids?
      How the body deals with excess amino acids
    • What process involves the diffusion of water through a membrane?
      Osmosis
    • Why is it important to maintain water levels in the blood?
      To ensure cells work efficiently
    • What happens if blood becomes too dilute?
      Water moves into cells by osmosis
    • What occurs if blood becomes too concentrated?
      Water moves out of cells by osmosis
    • How does the body take in water?
      Through food and drink
    • How does the body lose water via the lungs?
      When we exhale
    • What are the three ways the body can lose water?
      Through lungs, sweat, and kidneys
    • What does sweating also contain besides water?
      Ions and urea
    • How does the body control water loss through urine?
      By adjusting the amount produced by kidneys
    • What waste product do kidneys remove from the blood?
      Urea
    • What happens to blood after it leaves the kidneys?
      It contains no urea
    • What is selectively absorbed in the kidneys?
      Glucose, some ions, and some water
    • How do kidneys adjust the concentration of ions in the blood?
      By reabsorbing ions based on body needs
    • What happens to the concentration of glucose in the blood after passing through the kidneys?
      It remains unchanged
    • What happens to the concentration of urea in the blood after passing through the kidneys?
      It falls to virtually zero
    • What is the process called when the liver breaks down excess amino acids?
      Deamination
    • What toxic chemical is produced from excess amino acids?
      Ammonia
    • How is ammonia dealt with in the body?
      Converted to urea by the liver
    • What can urea be safely excreted by?
      The kidneys
    • What are the main functions of the kidneys?
      • Remove waste products like urea
      • Adjust levels of water and ions
      • Maintain homeostasis in the body
    • What happens during the process of deamination?
      1. Excess amino acids are broken down
      2. Ammonia is produced
      3. Ammonia is converted to urea
      4. Urea is excreted by kidneys
    • What are the consequences of imbalanced water levels in the blood?
      • Cells may gain too much water and burst
      • Cells may lose too much water and shrivel
      • Overall body function is compromised
    • What is homeostasis in relation to the kidneys?
      • Regulation of water and ion levels
      • Removal of waste products
      • Maintenance of stable internal environment