The functions of the kidneys

• what is ultrafiltered at the Bowman’s Capsule?

  water, ions, glucose, amino acids, urea
• what is selectively reabsorbed at the PCT?

  all glucose, all amino acids , some water, some ions
• where does ultrafiltration occur?

  in the glomerulus
• what is the role of the podocytes in the bowman’s capsule?

  foot-like structure on the inner layer of the bowmans capsule, substances move between the cell structures not through the cells themselves
• what produces high pressure in the glomerulus?

  the efferent arteriole is narrower than the afferent arteriole
• what is the basement membrane?

  a fine mesh of collagen fibres that prevent molecules with a molecular mass larger than 69000 from passing through
• what does ADH cause?

  makes the PCT and BC more permeable to water, making the urine more concentrated as more water is reabsorbed
• what is ultrafiltration?

  fluid forced under high pressure from the glomerulus into the bowman’s capsule