Cardiovascular System

    Cardiovascular System
    What formula, law or principle refers to the partial pressure of a gas?
    Only Henry’s law, the amount of dissolved gas is proportional to its partial pressure; it refers to gas partial pressure.
    Author: rikazzz Comment
    Cardiovascular System
    Which is correct? In its passage through the heart, blood is pumped into the pulmonary trunk:
    Blood passes through the left AV valve in order to enter the right ventricle from where it is pumped into the pulmonary trunk.
    Author: rikazzz Comment
    Cardiovascular System
    Which name is NOT applied to the valve between the left ventricle and the left atrium?
    The left atrioventricular valve is not a semilunar valve.
    Author: rikazzz Comment
    Cardiovascular System
    The valve between the atrium and the ventricle that pumps oxygenated blood is called:
    The left side of the heart pumps oxygenated blood, the mitral valve is the one.
    Author: rikazzz Comment
    Cardiovascular System
    To which of the following would the term “white cell” NOT be applied?
    An erythrocyte is a red blood cell.
    Author: rikazzz Comment
    Cardiovascular System
    Which of the following is a statement of Boyle’s law?
    Boyle’s law relates pressure in a gas to its volume.
    Author: rikazzz Comment
    Cardiovascular System
    In haemostasis, which molecule polymerises to become the insoluble blood clot?
    Fibrin is a monomer that polymerises to form a “soft clot”, and then crosslinking between fibrin produces a stable, web-like “hard clot”.
    Author: rikazzz Comment
    Cardiovascular System
    Which of the following descriptions refers to the “pulmonary circulation”?
    The pulmonary circulation is the circuit from the heart through the lungs and back again. It occurs because of the pumping action of the right ventricle sending blood through the pulmonary artery.
    Author: rikazzz Comment
    Cardiovascular System
    Why does the heart rate increases during exercise? To:
    Heart rate and hence cardiac output must rise to increase blood pressure. A higher BP increases the rate of blood flow, so blood can supply the active muscles with more oxygen and glucose, so these materials can be used to produce ATP which supply energy for the exercise.
    Author: rikazzz Comment
    Cardiovascular System
    Blood may flow in the aorta with a speed of 30 cm/s and in the capillaries with a speed of only 0.1 m/s. Why is there such a large difference in speed?
    The “equation of continuity” may be stated: volume flow rate = cross- sectional area × speed of flow. Hence if the total cross-sectional area of capillaries is very large (as it is), the speed of flow can be very slow while still allowing the required volume flow rate.
    Author: rikazzz Comment