Chemistry for Physiology

    Chemistry for Physiology
    The difference between dialysis and diffusion is that:
    Diffusion is passive and occurs in the direction of the concentration gradient. Diffusion can occur within a solution or across a membrane. Dialysis, on the other hand, requires a membrane and is a term applied to solutes, not water molecules.
    Author: rikazzz Comment
    Chemistry for Physiology
    Diffusion is the term given to the process where:
    This is the only correct definition of diffusion.
    Author: rikazzz Comment
    Chemistry for Physiology
    Fluid and electrolyte balance in the body is maintained by which of the following?
    The nephron is the functional unit of the kidney that does this job.
    Author: rikazzz Comment
    Chemistry for Physiology
    Which of the following foods when catabolised in the body produces the highest yield of energy?
    Fat is higher in energy (kilojoules) than either protein or carbohydrate. Chocolate has sugar (carbohydrate) as well as fat as an ingredient.
    Author: rikazzz Comment
    Chemistry for Physiology
    What do solutions of 5% glucose, 9.5% sucrose and 0.9% sodium chloride have in common? They:
    The three solutions are isotonic to blood. Choice A is incorrect; they have different (weight/volume) concentrations.
    Author: rikazzz Comment
    Chemistry for Physiology
    What is an insufficient concentration of potassium in the blood known as?
    The Latin word for potassium is kalium. The prefix “hypo-” refers to too little. Arguably, choice C is not wrong, but this expression is not used.
    Author: rikazzz Comment
    Chemistry for Physiology
    What is a “saturated fat”?
    Saturated means each carbon atom is directly bonded to four other atoms.
    Author: rikazzz Comment
    Chemistry for Physiology
    When in solution, an acidic drug also exists as its salt. What feature does the salt of a drug have that may not be shared by the acid form of the drug?
    The salt of the drug, being ionised, is more soluble in water (a polar liquid) than is the drug molecule.
    Author: rikazzz Comment
    Chemistry for Physiology
    What holds the primary structure of a protein together?
    Protein primary structure refers to the sequence of the linked amino acids. The link between adjacent amino acids is called a “peptide bond” – a special term reserved for the covalent bond between the C of one amino acid and the N of the adjacent amino acid.
    Author: rikazzz Comment
    Chemistry for Physiology
    What is the approximate range of pH of gastric juice in the stomach?
    The stomach has the lowest pH in the body due to the secretion of hydrochloric acid (a strong acid) into it.
    Author: rikazzz Comment