Anatomy and Physiology

    Gastrointestinal System
    What is the function of the hepatic portal vein?
    The digestion products of protein and carbohydrate (but not of triglycerides) are transported to the liver by the portal vein.
    Author: rikazzz Comment
    Renal System
    How are cortical nephrons different from juxtamedullary nephrons?
    Cortical nephrons are situated almost entirely within the cortex, while the far less numerous juxtamedullary nephrons have their glomeruli adjacent to the medulla and extend their loop of Henle into the medulla.
    Author: rikazzz Comment
    Cardiovascular System
    Which of these statements about pressure in static liquids is NOT true? Pressure at a point in a liquid:
    Volume (and even mass) of liquid above a point does not affect the pressure felt at that point. It is the length of the column of liquid above the point and the effect of gravity that determines the pressure in the liquid.
    Author: rikazzz Comment
    Measurement, Errors, Data and Unit Conversion
    The median is a measure of central tendency. It may be defined as:
    Median is the midpoint of the number of measured values. The value that appears most often in a set of data is called the mode.
    Author: rikazzz Comment
    Cardiovascular System
    Which period of the heart cycle is completely occupied by the ventricles contracting?
    Systole is the term applied to contraction of the cardiac muscle.
    Author: rikazzz Comment
    Cardiovascular System
    What is meant by the statement that the amount of dissolved O2 in blood is 100 mmHg?
    When a liquid is in contact with a mixture of gases, the amount of a gas that will dissolve in the liquid (at equilibrium) is stated as the partial pressure of that gas in the mixture. Hence if there is 100 mmHg of dissolved O2 in a liquid, then the gas that was in contact with the liquid must have contained oxygen at a partial pressure of 100 mmHg. Choice B is also correct but not as good an answer as C. Choices A and D are nonsense.
    Author: rikazzz Comment
    Cardiovascular System
    The usefulness of having elastic arteries is in:
    The expansion of arteries as blood is pumped into them limits resistance to flow and blood pressure. Smooth muscle in the wall produces vasoconstriction and vasodilation.
    Author: rikazzz Comment
    Nervous System
    The action potential occurs when one of the following events occurs. Which one?
    Sodium rushing in following by potassium rushing out produces the action potential.
    Author: rikazzz Comment
    Chemistry for Physiology
    Which of the following chemical formulae represents a typical carbohydrate?
    A carbohydrate is composed of carbon, hydrogen and oxygen atoms. Usually there are twice as many H atoms as C atoms. Choice D, having relatively few O atoms, is typical of a lipid.
    Author: rikazzz Comment
    Integument
    Which statement about vitamin D is INCORRECT?
    As our body can make “vitamin D”, it is not an essential part of our diet. As it circulates in the bloodstream, it is regarded as a type of steroid hormone.
    Author: rikazzz Comment