Anatomy and Physiology

    Cardiovascular System
    Which is the LEAST common type of white blood cell?
    Less than 1% of WBC are basophils. Neutrophils are the most common. Thrombocytes are not WBC or even cells.
    Author: rikazzz Comment
    Renal System
    Which statement about kidney anatomy is correct?
    The cortex is superficial to the medulla. All glomeruli are in the cortex. The medulla has the collecting ducts.
    Author: rikazzz Comment
    Muscles
    What is the role of acetylcholine in muscle cell contraction?
    ACh crosses the synaptic cleft to transmit a neural impulse to the muscle sarcolemma.
    Author: rikazzz Comment
    Muscles
    What is a “sarcomere”?
    A myofilament is a long line of sarcomeres joined end to end. So one section of a myofilament is a sarcomere.
    Author: rikazzz Comment
    Respiratory System
    What constitutes the respiratory membrane?
    The cells lining the alveoli and the capillaries and their fused basement membrane along with the fluid (surfactant) lining the alveoli together are the membrane. Pleurae, ciliated cells and macrophages are not.
    Author: rikazzz Comment
    Muscles
    Which one of the following is NOT a characteristic of skeletal muscle?
    Skeletal muscle is voluntary and so is innervated by the somatic nervous system, not the autonomic system.
    Author: rikazzz Comment
    Muscles
    With respect to the flexion of the forearm, which of the following statements is correct?
    Antagonist for flexion is the triceps brachii (the origin, not the insertion of the biceps brachii, is on the scapula).
    Author: rikazzz Comment
    Nervous System
    People over 45 years of age eventually require reading glasses. This condition (known as presbyopia) is the result of which of the following conditions?
    The elastic lens loses some of its elasticity with age so is not able to focus light from nearby objects such as books. Hence “reading” glasses – which have convex lenses – become necessary.
    Author: rikazzz Comment
    Nervous System
    Which choice correctly ends the following sentence? The parasympathetic division is part of the:
    The parasympathetic division is part of the autonomic nervous system.
    Author: rikazzz Comment
    Renal System
    Which list of structures is presented in the correct order in which urine passes through them on the way to the bladder?
    Collecting ducts empty into the papilla, so the papilla must be first.
    Author: rikazzz Comment