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Unformatted text preview: PHYSIOLOGY 210 WINTER 2001 MIDTERM 1. Which division of the autonomic nervous system prepares the body for intense levels of activity and stress? a) Sympathetic division b) Parasympathetic division c) Craniosacral division d) Intramural division e) Somatomotor division The answer is a 2. During isovolumetric contraction of the ventricles a) the atrioventricular valves are open while the pulmonary and aortic valves are closed b) the atrioventricular valves are closed while the pulmonary and aortic valves are open c) all cardiac valves are open d) all cardiac valves are closed e) ventricular pressure is constant The answer is d 3. The PR interval of the electrocardiogram represents a) atrial depolarization b) septal depolarization c) ventricular depolarization d) the time taken for the wave of depolarization to traverse the sino-atrial node e) the time taken for the wave of depolarization to traverse the atrio-ventricular node The answer is e 4. The velocity of blood flow is the greatest in a) arterioles b) capillaries c) veins d) right ventricules e) aorta The answer is e 5. Blood returning to the heart form the systemic circulation a) enters the right atrium b) enters the right ventricle c) is carried by systemic arteries d) is carried by the pulmonary vein e) is fully oxygenated Ans: A 6. The pulmonary and systemic circulations PHYSIOLOGY 210 WINTER 2001 MIDTERM a) are arranged in parallel b) are arranged in series c) have the same vascular resistance d) carry different amounts of blood e) non of the above Ans: B 7. Let us assume that while sitting quietly, you hold your breath for 30 seconds. Towards the end of breath holding you will expect a) 100% hemoglobin saturation b) increased CO 2 content in arterial blood c) decreased O 2 content in arterial blood by 10vol% d) a decrease in body metabolism e) PO 2 of 100mmHg in arterial blood Ans: B 8. Intrapleural pressure a) during inspiration is equal to atmospheric pressure b) in static condition, is a measure of recoil pressure of the chest wall...
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- Spring '08