Anatomy and Physiology

    Chemistry for Physiology
    Electrolyte balance is achieved largely by:
    The kidneys have the ability to reabsorb and secrete ions and water as required. Aldosterone causes the kidney tubules to reabsorb sodium ions while promoting the secretion of potassium ions.
    Author: rikazzz Comment
    Nervous System
    What do neurones in the precentral gyrus do?
    The precentral gyrus is the primary motor area. It allows conscious control over skeletal muscle movement.
    Author: rikazzz Comment
    Ionising Radiation
    Which of the following statements about radioactivity is correct?
    Radioactivity involves the nucleus of an atom. Microwaves are not produced by radioactivity. While radiation from a nucleus could remove an inner shell electron from another atom, and when this electron is replaced by another “falling” into its place while emitting an x-ray photon, this is not classed as radioactivity.
    Author: rikazzz Comment
    Reproductive System
    What is the result of meiosis in males? The production of:
    Meiosis results in four haploid cells being produced. Sperm in the male.
    Author: rikazzz Comment
    Ionising Radiation
    Which of the statements about radionuclides selected for inclusion in radiopharmaceuticals used in medical imaging is correct? They should:
    Low-energy gamma rays are sufficiently penetrating so that most will pass out of the body and be available for detection, but not so penetrating that they will pass through a “gamma camera” without being detected.
    Author: rikazzz Comment
    Integument
    To what in the skin does the term “nociceptors” refer?
    The prefix “noci” is derived from the Latin for hurt.
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    Skeleton and Joints
    Choose the correct sentence. Cancellous bone contains
    Cancellous (spongy) bone does not contain osteons but does contain the little beams known as trabeculae.
    Author: rikazzz Comment
    Chemistry for Physiology
    The isotonic concentration for sodium chloride is 0.9% and for glucose is 5%. Which of the following solutions is isotonic with the above solutions? A solution containing:
    Choices A and B are both hypertonic. Four percent glucose contains 4/5 of the concentration of dissolved particles that are in (isotonic) 5% glucose. 0.18% sodium chloride contains 1/5 of the concentration of dissolved particles that are in 0.9% sodium chloride (0.18/0.9 = 0.2). One fifth plus four fifths add to five fifths of the number of particles that are required for an isotonic solution.
    Author: rikazzz Comment
    Electricity
    What is meant when a medical procedure room is electrically wired as a “body- protected area”? Patients that are connected to an electrical device are:
    Procedures conducted in body-protected areas do not involve a direct electrical connection to the heart. Hence only faults that allow relatively large currents can produce electrocution (macro-electrocution).
    Author: rikazzz Comment
    Skeleton and Joints
    Which bone of the head has a synovial joint?
    The ramus of the mandible articulates with the temporal bone at the mandibular fossa. The joint is freely moveable, allowing us to chew and speak.
    Author: rikazzz Comment