Anatomy and Physiology

    Body Temperature, Energy and Heat Loss
    On a normal winter day, by what means does the human body lose most of its heat?
    Heat loss through radiation (of infrared radiation) occurs continuously despite being clothed. Heat loss by conduction is low as clothes are insulators and also decrease convection losses. Sweating will be low on a cool winter day so evaporation will not be a major heat loss avenue.
    Author: rikazzz Comment
    Cardiovascular System
    Which blood cell fits the following description: multilobed nucleus, inconspicuous cytoplasmic granules and most common type of blood cell except for red blood cells?
    Neutrophils are the most common WBC and have a large multilobed nucleus.
    Author: rikazzz Comment
    Respiratory System
    If the partial pressure of oxygen in the air contained in the alveoli of the lungs is 14 kPa, then the partial pressure of oxygen dissolved in the alveolar fluid will be:
    The amount of a gas that will dissolve in a liquid that is in contact with the gas is determined by the partial pressure of that gas. If pp. of O is 14 kPa, then the concentration of O that is dissolved in the alveolar fluid is also 14 kPa.
    Author: rikazzz Comment
    Nervous System
    Where does the spinal cord start and finish?
    The foramen magnum is the hole in the occipital bone. Beyond L2, spinal nerves descend within the arachnoid mater but are not enclosed within the pia mater that covers the spinal cord.
    Author: rikazzz Comment
    The Physics of Waves: Light Waves, Sound Waves and Ultrasound
    Which is the BEST definition of a wave?
    The other choices also describe a wave but not in the most general terms.
    Author: rikazzz Comment
    Gastrointestinal System
    Fatty acids are absorbed from the gut into structures known as:
    Lacteals contain lymph in which digested fats are transported to rejoin the bloodstream in the vena cava via the thoracic duct.
    Author: rikazzz Comment
    Nervous System
    Which lobe of the brain is NOT named after the cranial bone to which it is deep?
    The insula is a deep lobe that is covered by the frontal and temporal lobes hence is not adjacent to any cranial bone.
    Author: rikazzz Comment
    The Physics of Waves: Light Waves, Sound Waves and Ultrasound
    Visible light waves are examples of:
    Visible light are electromagnetic waves that are detectable by the human eye.
    Author: rikazzz Comment
    Chemistry for Physiology
    Which of the following may happen “by osmosis”?
    Osmosis is a word used to describe the movement of water through a membrane from the side where the concentration of water molecules is greater to the side where the water concentration is lower.
    Author: rikazzz Comment
    Endocrine System
    Which of the following is NOT a mechanism of hormone action?
    It is Ca ions (not a hormone) that bind to troponin to initiate a muscle cell contraction. The other three choices are true.
    Author: rikazzz Comment