Anatomy and Physiology

    Gastrointestinal System
    All of the following statements regarding the liver are true except one, which one?
    Is not true. In fact blood from the hepatic artery and the hepatic portal vein mix and flow towards the central vein of a lobule.
    Author: rikazzz Comment
    Cardiovascular System
    With which blood types can a person with blood type B be safely transfused?
    A person with blood type B has anti-A agglutinins in their plasma, so he/she cannot receive cells with the A antigen on the RBC. Hence the blood types in choices A, C and D are not suitable.
    Author: rikazzz Comment
    Nervous System
    The blood-brain barrier functions to protect the brain from:
    These substances would alter the function of, or damage, the brain. Glucose, oxygen, carbon dioxide, ethyl alcohol and nicotine can cross the BBB easily.
    Author: rikazzz Comment
    Chemistry for Physiology
    Which term below is NOT suitable to describe the concentration of a solution?
    This states an amount of substance only, without reference to the volume of solvent involved.
    Author: rikazzz Comment
    Gastrointestinal System
    A lobule of the liver contains several blood vessels. Which one carries nutrient- rich blood from the small intestine?
    “Portal” refers to a vein that transports blood from one capillary bed to another (rather than returning it to the heart).
    Author: rikazzz Comment
    Respiratory System
    If the pressure between the visceral pleura of the lungs and the parietal pleura of the thoracic cage is −6 mm Hg, then:
    The intra-pleural pressure must be negative (=below atmospheric pressure) if the lungs are to expand as the chest wall expands. It oscillates between about −2 mmHg (−270 Pa) when inhalation is about to begin and about −6 mmHg (−800 Pa) when inhalation has ended and exhalation is about to occur. Hence, a value of ~6 mmHg indicates that inhalation is occurring.
    Author: rikazzz Comment
    Gastrointestinal System
    What feature do procarboxypeptidase, pepsinogen, fibrinogen and chymotrypsinogen have in common?
    The prefix and suffix “pro- ” and “-ogen” refer to these molecules needing modification to become enzymes. In their present form, they are inactive.
    Author: rikazzz Comment
    Gastrointestinal System
    What is the name of the hormone that inhibits the stomach from secreting gastric juice?
    One of the effects of CCK is to inhibit gastric secretion.
    Author: rikazzz Comment
    Gastrointestinal System
    Fatty acids are transported around the body by the blood in structures known as:
    Chylomicrons transport fats via the lymph system to the blood. Micelles exist in the lumen of the intestine.
    Author: rikazzz Comment
    Nervous System
    Sound waves are conducted from the air outside the ear to the inner ear by the processes of:
    The air in the external ear canal resonates (at about 3000 Hz), the ossicles are a lever system that amplifies the movement of the tympanic membrane; the oval window, being about one twentieth the size of the tympanic membrane, also amplifies the pressure applied to the cochlear fluid compared to that applied to the tympanic membrane.
    Author: rikazzz Comment