Anatomy and Physiology

    Cells and Tissues
    The cells of a tissue are long and cylindrical and are contain a great number of nuclei. In what type of tissue will such a cell be found?
    The cell is a skeletal muscle fibre, so the tissue is muscle tissue.
    Author: rikazzz Comment
    Nervous System
    Which statement about refraction of light in the human eye is correct?
    The cornea is also a lens; hence, light is refracted as it enters the cornea from air. As the difference between air and corneal tissue is greater than the difference between aqueous humour and the lens, more refraction occurs in the cornea than in the “lens”.
    Author: rikazzz Comment
    Chemistry for Physiology
    Which of the following reactions demonstrates the action of the ammonia (NH3) buffer?
    A buffer must destroy acid, so choices C and D, in which acid is “created”, are wrong. A buffer destroys acid by accepting a hydrogen atom from the hydronium molecule so converting it to water: choice B describes this and has equal numbers of hydrogen atoms (6) on each side of the arrow, while choice A has an imbalance of H atoms and of charge.
    Author: rikazzz Comment
    Nervous System
    What type of neurones are motor neurones?
    All motor neurones are multipolar.
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    Cardiovascular System
    Which of the following responses best describes term “pulse pressure”?
    Pulse pressure is defined as the difference between the maximum and minimum BP values.
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    Ionising Radiation
    Which of the following pairs of nuclides are isotopes?
    Isotopes are two forms of the same element that have different numbers of neutrons in the nucleus. This means same symbol, and same atomic number (subscript), but different mass number (superscript).
    Author: rikazzz Comment
    Chemistry for Physiology
    What happens when a sodium atom reacts to form a compound? The atom will:
    Sodium is a metal so it will lose an electron. As it occurs in Period IA of the periodic table, we know it loses a single electron.
    Author: rikazzz Comment
    Muscles
    Which of these events is necessary for the contraction of a muscle cell?
    The hydrolysis of ATP energises the cross-bridge (myosin molecules do not get shorter; calcium binds to troponin, not tropomyosin; calcium returns to the SR after contraction).
    Author: rikazzz Comment
    Integument
    The integument consists of which of the following layers?
    Hypodermis is not part of the integument. Choice C excludes the dermis.
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    Organisation of the Body
    What structure separates the abdominal and pelvic cavities?
    The pelvic cavity is not physically separated from the abdominal cavity. For example, parts of the small intestine are located in both “cavities”.
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