Anatomy and Physiology

    Gastrointestinal System
    What happens to the products of digestion of lipids? They are absorbed into a:
    Digested fats absorbed from the gut are transported in the lymph. They re-enter the bloodstream via the thoracic duct and then travel to the heart.
    Author: rikazzz Comment
    Integument
    Which of the following situations could produce life-threatening fluid loss and infection?
    The waterproof outer layer of the epidermis is lost if skin is burnt off, so evaporation from the wet tissues beneath proceeds rapidly.
    Author: rikazzz Comment
    Integument
    Choose the incorrect statement below.
    Dendrocytes are macrophages, and “dendrocidin” is not produced.
    Author: rikazzz Comment
    Endocrine System
    The posterior pituitary does which one of the following?
    OT and ADH are made in hypothalamus and passed along neurones to the posterior pituitary.
    Author: rikazzz Comment
    Nervous System
    To what part of the nervous system does the somatic nervous system belong?
    The somatic nervous system carries commands from the brain (efferent impulses) to the muscles and glands – which are in the peripheries of the body.
    Author: rikazzz Comment
    Cardiovascular System
    The symbols in Poiseuille’s law have the following meanings: V represents the volume flow rate, ΔP the pressure drop, R the radius of the tube, η the viscosity of the liquid and l the length of the tube. Which of the following relationships from Poiseuille’s law is NOT correct?
    Volume flow rate decreases with length of tube as greater length means greater resistance to flow. It should be V ∝ 1/l.
    Author: rikazzz Comment
    Cells and Tissues
    What are generally referred to as organelles?
    Organelles are not glands. They are structures within a cell.
    Author: rikazzz Comment
    The Physics of Waves: Light Waves, Sound Waves and Ultrasound
    What frequencies are attributed to the inaudible sound known as ultrasound?
    Frequencies less than 20 Hz are call infrasound. Frequencies greater than 2 kHz (2000 Hz) are still audible. The best answer is 2 MHz. While this is frequency typical of medical ultrasound, any frequency greater than 20,000 Hz is inaudible and called ultrasound.
    Author: rikazzz Comment
    Renal System
    Which section of the renal tubule is permeable to urea?
    PCT is permeable to urea, so as volume of filtrate in PCT decreases due to absorption of water, urea concentration in filtrate increases. This promotes passive reabsorption of urea along its concentration gradient.
    Author: rikazzz Comment
    The Physics of Waves: Light Waves, Sound Waves and Ultrasound
    What is the speed of sound in water at 20 °C?
    If you have an idea of the approximate value of the speed of sound in air, choices A, C and D can be easily rejected.
    Author: rikazzz Comment