Gastrointestinal System

    Gastrointestinal System
    Name the major cell type in a liver lobule.
    Hepato- = liver. Kupffer cells also occur in the liver but are macrophages.
    Author: rikazzz Comment
    Gastrointestinal System
    In terms of the physiology of digestion, to what does the term “hydrolysis” refer? To the:
    The “hydro-” part of hydrolysis refers to water, while the “-lysis” part refers to the splitting of a large molecule into two smaller parts. The water molecule also splits into H+ and OH- which are attached to the two smaller fragments.
    Author: rikazzz Comment
    Gastrointestinal System
    Which of the following is a function of bile?
    This is known as emulsification.
    Author: rikazzz Comment
    Gastrointestinal System
    Why are sinusoids the type of capillaries found within a liver lobule?
    The epithelial cells that make up sinusoids have gaps between them large enough for plasma proteins to fit through and to enter the blood.
    Author: rikazzz Comment
    Gastrointestinal System
    One of the following is NOT a function of the large intestine. Which one?
    Digestion occurs and is completed in the small intestine.
    Author: rikazzz Comment
    Gastrointestinal System
    One of the functions of the liver is to produce:
    Blood cells are produced in the bone marrow; digestive enzymes are produced in the pancreas and gut wall; the hormones insulin and glucagon are produced by the pancreas.
    Author: rikazzz Comment
    Gastrointestinal System
    When is it considered that food material is outside of the body?
    Food in the gut has not “entered the body” until it has been absorbed into the epithelial lining. This happens after being hydrolysed into molecules that are small enough to be absorbed. The material that is urinated or defecated out is indeed outside the body, but is not considered to be food.
    Author: rikazzz Comment
    Gastrointestinal System
    Digestion of food molecules is necessary so that:
    The production of molecules that are small enough to be absorbed into epithelial cells is the purpose of digestion.
    Author: rikazzz Comment
    Gastrointestinal System
    The pH of the stomach and the pH of the small intestine are BEST described (respectively) as:
    The pH of the stomach contents is about 2 (strongly acidic), while the pH of the small intestine is about 8 (weakly alkaline). Thus B is the best answer.
    Author: rikazzz Comment
    Gastrointestinal System
    Which of the following could NOT be used to describe pepsinogen?
    Pepsinogen is an inactive protein enzyme. But it is not a hormone.
    Author: rikazzz Comment