Anatomy and Physiology

    Endocrine System
    Which hormones are produced by the adrenal cortex and contribute to carbohydrate metabolism?
    The “-cort-” part of the word refers to the adrenal cortex, while the “gluco-” part refers to the role carbohydrate (glucose) metabolism.
    Author: rikazzz Comment
    The Physics of Waves: Light Waves, Sound Waves and Ultrasound
    What will a sound of frequency 250,000 Hz be?
    250 kHz is way above the upper limit of human hearing so is ultrasound.
    Author: rikazzz Comment
    Nervous System
    When we say that the cell membrane is polarised, we mean that:
    Polarised means that the charge is different on the two sides of the membrane, with the inside being negative with respect to the outside.
    Author: rikazzz Comment
    Cardiovascular System
    What can be said about a person who has the “A” antigen on their red blood cells?
    Their blood contains anti-B agglutinins. If you have the A antigen on your RBC, you cannot have the anti-A agglutinin in your plasma or you would agglutinate your own blood.
    Author: rikazzz Comment
    Gastrointestinal System
    One of these processes is NOT part of carbohydrate metabolism in the liver. Which one?
    ATP production occurs in the mitochondria of cells and is called cellular respiration (rather than carbohydrate metabolism).
    Author: rikazzz Comment
    Nervous System
    Which of the following are NOT part of the cerebral cortex?
    The thalamus is part of the diencephalon, not the cerebral cortex (cerebrum).
    Author: rikazzz Comment
    Nervous System
    A multipolar neuron has more than one of what?
    Many dendrites are attached to the cell body of multipolar neurones.
    Author: rikazzz Comment
    Cells and Tissues
    Which statement is true of the 23 chromosomes within a sperm?
    A sperm has 23 chromosomes which is the haploid number. The male that produced the sperm has 46 chromosomes (23 pairs) in their somatic cells – 23 each from the man’s father and mother. When sperm are produced, the 46 chromosome assemble and pair up. The man’s X and Y chromosomes pair up. Each pair of chromosomes then separates so that only one of each pair moves into a new sperm. Which one of the pair ends up in which sperm is a random process. It is possible that an individual sperm has any number of chromosomes between 0 and 23 that originated from the father.
    Author: rikazzz Comment
    Muscles
    Which of the following muscles is NOT named after its location in the body?
    The deltoid is named after its shape, which is likened to the capital Greek letter delta (a triangle).
    Author: rikazzz Comment
    Gastrointestinal System
    Which of the following is an enzyme?
    Amylase is the only enzyme. Pepsinogen is not an enzyme until it is changed to pepsin.
    Author: rikazzz Comment