chapt 5.6 absorbed nutrients

• assimilation

  process where some absorbed nutrients are converted into a new cytoplasm/provide energy
• glucose and amino acids

  1. aft absorption, blood in villi rich in nurtients
• glucose

  1. is assimilated and broken down during respiration to release energy for cell activities
  2. excess glucose returned to liver
  3. insulin prod in pancreas stimulates liver cells to convery excess glucose to glycogen
• glucose

  when body needs energy, liver converts glycogen to glucose, which is transported by blood to cells
• amino acids

  1. converted to new cytoplasm
  2. used to make enzymes and hormones
  3. excess amino acids deaminated in liver
• hepatic artery

  transports blood from heart to liver
• hepatic vein

  transports glucose rich blood from liver to rest of the body
• hepatic portal vein

  transports nurtients from small int. to liver
• transport and utilisation of fats

  1. absorbed into lymphatic capillaries
  2. join to form lymphatic vessels
  3. discharge fats into bloodstream carrying fats all around the body
• transport and utilisation of fats

  too much glucose in body :

  1. excess fats stored in special adipose tissues found beneath the skin and around heart and kidney
  2. adipose tissue protects these organs
• transport and utilisation of fats

  not enough glucose in body :

  1. fats broken down to provide energy for cell activities
• transport and utilisation of fats

  sufficient glucose supply :

  1. fats used to build protoplasm (e.g cell membrane)