Anatomy and Physiology

    Cardiovascular System
    In which of the four lists below are the types of capillaries listed in order of permeability with the first being the least permeable and the last being the most permeable type of capillary?
    The capillaries of the BBB are least permeable (they form a “barrier”), while sinusoids are the most permeable.
    Author: rikazzz Comment
    Cardiovascular System
    Complete the sentence correctly. The left ventricle pumps:
    The LV produces a higher pressure than the right in order to overcome the greater resistance to flow that exists in the systemic circuit.
    Author: rikazzz Comment
    Cardiovascular System
    What is the standard international unit of pressure?
    The pascal (after Blaise Pascal) is the SI unit. It is a small unit so often the multiple kPa is used.
    Author: rikazzz Comment
    Skeleton and Joints
    How do synovial joints differ from the other types of bone articulation?
    And the cavity is filled with synovial fluid. Choice D is nonsense.
    Author: rikazzz Comment
    Renal System
    The functional unit of the kidney that filters blood and produces urine is called the:
    The nephron performs all of the kidney functions.
    Author: rikazzz Comment
    Chemistry for Physiology
    What is meant by referring to a solution concentration of 0.18%?
    0.18% means 0.18 g per 100 ml of solution.
    Author: rikazzz Comment
    Nervous System
    Where is that part of the brain that allows us to consciously control voluntary muscle movements located?
    The “premotor cortex” in fact lies just anterior to the precentral gyrus, which is the primary motor area. Your premotor cortex allows you to make choices about which movement is appropriate.
    Author: rikazzz Comment
    The Physics of Waves: Light Waves, Sound Waves and Ultrasound
    To what radiation does the term “nonionising radiation” refer? To radiation that consists of photons with energy that is:
    The term “nonionising” implies that ions are not produced. Ions are produced when one or more electrons are removed from an atom.
    Author: rikazzz Comment
    Ionising Radiation
    In radiotherapy, why is the patient’s irradiation treatment “fractionated”, that is, consist of (say) 20 sessions and spread over (say) 4 weeks – rather than given all at one session?
    Radiotherapy also damages the healthy tissue through which it passes. By choosing a different path for the radiotherapy beam through the body for the next “fraction”, while at the same time ensuring that the tumour is always in the beam, allows the healthy tissue the time to recover.
    Author: rikazzz Comment
    Biomechanics
    Which of the following is NOT considered part of good lifting technique?
    It is best to keep the feet separated to widen the base of support. A wide stance also makes it easier to get close to the object to be lifted.
    Author: rikazzz Comment