Chemistry for Physiology

    Chemistry for Physiology
    If the following amounts of the given substances were dissolved in water, which would result in four osmoles of dissolved particles?
    Osmole is a term used when the solute particles came from an ionic substance. Osmoles = moles × number of ions in formula. There are two ions in the formula for sodium chloride, hence 4 osmoles. There are three ions in the formula for sodium sulphate, hence 6 osmoles.
    Author: rikazzz Comment
    Chemistry for Physiology
    The chemical elements can be divided into metal elements and non-metal elements. Which of the statements about metals and non-metals is correct?
    Metal ions are positively charged (having lost an electron/s); consequently they are attracted to a cathode (a negatively charged electrode).
    Author: rikazzz Comment
    Chemistry for Physiology
    Which of the following is the correct combination for the nucleic acid DNA?
    “Deoxyribose” supplies the “D” in DNA. The base uracil occurs in RNA (not DNA) where it substitutes for the thymine that occurs in DNA.
    Author: rikazzz Comment
    Chemistry for Physiology
    If the pH of the stomach contents changed from 3 to 2, which of the following is true?
    When pH decreases from 3 to 2, this indicates an increase in hydronium ion concentration by a factor of 10. Remember pH is a logarithmic scale.
    Author: rikazzz Comment
    Chemistry for Physiology
    What effect would an acid have when added to the following solutions?
    An acid has the ability to produce hydronium ions when added to water.
    Author: rikazzz Comment
    Chemistry for Physiology
    A common IV solution is the combination 0.18% sodium chloride and 4% glucose (also called “4% and a fifth”). How many grams of each solute will be in a 1 L bag?
    0.18% sodium chloride and 4% glucose means 0.18 g of sodium chloride per 100 ml and 4 g of glucose per 100 ml. So in 1 L there would be 1.8 g and 40 g, respectively.
    Author: rikazzz Comment
    Chemistry for Physiology
    The symbol for potassium is which of the following?
    K is from kalium which is the Latin word for potassium.
    Author: rikazzz Comment
    Chemistry for Physiology
    If the pH of a patient’s blood is 7.4, then it can be said that the patient has:
    pH above 7.0 indicates an alkaline solution. However 7.4 is within the healthy range, so there is no alkalosis.
    Author: rikazzz Comment
    Chemistry for Physiology
    Which reaction below demonstrates the action of the bicarbonate buffer?
    A buffer must destroy acid, so choices C and D, in which acid is “created”, are wrong. A chemical reaction must have equal numbers of H atoms on each side of the arrow, but choice B has 5H on one side and 3H on the other.
    Author: rikazzz Comment
    Chemistry for Physiology
    An isotonic solution is one which:
    “Iso-” means “the same”. When the concentration of the surrounding liquid is the same as that inside a RBC, then no net water movement occurs.
    Author: rikazzz Comment