Gastrointestinal System

    Gastrointestinal System
    One of the following is NOT a function of the liver. Which one?
    Red blood cells are recycled in the spleen.
    Author: rikazzz Comment
    Gastrointestinal System
    What name is given to the movement of food material through the gastrointestinal tract?
    While segmentation is also movement, it is a to and fro movement rather than unidirectional, so peristalsis is the best answer.
    Author: rikazzz Comment
    Gastrointestinal System
    What are the end products of carbohydrate digestion?
    Monosaccharides or “simple” sugars.
    Author: rikazzz Comment
    Gastrointestinal System
    Which one of the following is a function of the liver?
    Plasma proteins (albumins, globulins and fibrinogen) are produced in the liver.
    Author: rikazzz Comment
    Gastrointestinal System
    Why are the blood capillaries in the liver lobules so permeable?
    Plasma proteins are large molecules that otherwise would not be able to enter (or leave) blood capillaries.
    Author: rikazzz Comment
    Gastrointestinal System
    From which of the gut structures below is most digested food absorbed?
    The ileum is part of the small intestine distal to the duodenum which has a structure suited to absorption.
    Author: rikazzz Comment
    Gastrointestinal System
    The products of fat digestion are absorbed into the epithelial cells of the intestinal wall differently from the way products of protein and carbohydrate digestion are. The reason is:
    The products of fat digestion are fat (lipid) soluble so can penetrate the plasma membrane which is made of lipid.
    Author: rikazzz Comment
    Gastrointestinal System
    What are some products of lipid digestion?
    Lipids are digested into free fatty acids and monoglycerols.
    Author: rikazzz Comment
    Gastrointestinal System
    Protein is digested to polypeptides by which of the following?
    Pepsinogen is inactive (otherwise it would digest the proteins with the zymogenic/chief cells) until converted to pepsin by HCl.
    Author: rikazzz Comment
    Gastrointestinal System
    Which of the following glands are accessory organs of the digestive system?
    Salivary glands produce a secretion (saliva) that empties into the digestive tract via a tube. (Pancreatic islets are in the pancreas but are themselves not a gland.)
    Author: rikazzz Comment