selective reabsorption

• what is meant by selective reabsorption?


  this is the process by which useful products are reabsorbed back into the blood
• give general examples of what substances will be reabsorbed into the blood by selective reabsorption


  glucose and salts
• what type of solution will the filtrate be at the end of the proximal convoluted tubule


  isotonic
• by what process is glucose and amino acids reabsorbed into the blood

  secondary active transport using a co-transport mechanism with Na^+
• how are most of the salts (mineral ions) reabsorbed into the blood

  active transport /co-transport
• how is water reabsorbed into the blood

  osmosis
• how are proteins and urea selectively reabsorbed


  diffusion
• what is meant by a pct


  proximal convoluted tubule
• where does selective reabsorption take place


  proximal convoluted tubule
• list adaptations of the structure of the proximal convoluted tubule in relation t selective reabsorption


  large surface area , microvilli on cuboidal epithelial , mitochondria and tight junctions
• why is having a lot of mitochondria in the pct an advantage


  to provide more ATP for active transport
• why is having a large surface area on the cuboidal epithelial cells in the pct an advantage


  to provide a large surface area and basal channels