Anatomy and Physiology

    Cells and Tissues
    Facilitated diffusion refers to the process of:
    Facilitated refers to the role of the protein carriers. The other choices refer to diffusion, active transport and osmosis, respectively.
    Author: rikazzz Comment
    Cardiovascular System
    What is the outermost layer of the heart wall known as?
    “Epi-” refers to “on top of”. It is the visceral part of the pericardium.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    Which of the following statements about work is NOT correct?
    The reverse is true as W = F × s.
    Author: rikazzz Comment
    Nervous System
    The nervous system is divided into two divisions. What are they called?
    The central nervous system and the peripheral nervous system are the two divisions.
    Author: rikazzz Comment
    Ionising Radiation
    What is the difference between x-rays and gamma rays?
    Apart from the difference in how they are produced, x-rays and gamma rays are the same phenomenon.
    Author: rikazzz Comment
    Cardiovascular System
    The kinetic molecular theory of gases provides us with some valuable insights into the behaviour of gases. One correct prediction of the theory is that gas pressure is:
    Gas molecules exert a force on walls as they bounce off. Gas pressure may be understood as the cumulative effect of the force exerted by millions of particles, divided by the area of the walls.
    Author: rikazzz Comment
    Chemistry for Physiology
    What is the movement of water molecules across a plasma membrane from the side where the solution concentration is more dilute to the side where the solution is more concentrated called?
    Osmosis is the diffusion of WATER molecules through a membrane, from where there is a higher concentration of water molecules to where there is a lower concentration of water molecules (i.e. into the more concentrated solution).
    Author: rikazzz Comment
    Nervous System
    What can correctly be said about somatic motor neurons?
    Somatic motor neurons are multipolar. Their cell bodies are located in the CNS – within the spinal cord.
    Author: rikazzz Comment
    Measurement, Errors, Data and Unit Conversion
    What is 120 mg expressed as grams?
    1 mg is a thousandth of a gram (0.001 g), so 120 mg is 120 thousandths = 0.120 (mg to g: shift the decimal point three places to the left).
    Author: rikazzz Comment
    Cardiovascular System
    Which of the following formed elements of the blood is important in the formation of clots?
    Thrombocytes (platelets) are attracted by chemicals released by damaged endothelial cells and in turn release substances which cause other platelets to aggregate to form a platelet plug to cover the hole.
    Author: rikazzz Comment