Decompression sickness occurs in divers as a result of: a) prolonged exposure to
ID: 3519685 • Letter: D
Question
Decompression sickness occurs in divers as a result of: a) prolonged exposure to low oxygen. b) CO2 retention. c) barotrauma. d) nitrogen narcosis. e) the formation of bubbles of inert gas in tissues and blood. Resistance to flow in the airways is: a) greatest in the terminal bronchioles b) described by Poiseulle's Law. c) diminished during an asthma attack. d) regulated by secretion of surfactant. e) none of the above Deoxygenated blood reaches the lungs via the: a) aorta. b) pulmonary vein. c) pulmonary artery. d) superior vena cava. e) carotid arteries. Acclimatization at high altitude: a) is diminished by hyperventilation b) includes a rightward shift in the O2 dissociation curve at extreme altitude c) is primarily a result of a rapid increase in the number of red blood cells. d) increases renal tubule cell H' secretion, and decreases HCO3 excretion. e) reduces renal tubule cell H secretion, and increases HCO3 excretion.Explanation / Answer
Decompression sickness occurs in divers as a result of THE FORMATION OF BUBBLES OF INERT GAS IN TISSUES AND BLOOD.
It happens due to reduction in pressure when a person leaves high pressure environment or goes to higher altitude or ascends from depth (in case of divers).
Resistance to flow in the airways is GREATEST IN THE TERMINAL BRONCHIOLES.
Air resistance is affected by changes in diameter of the airways. The diameter of terminal bronchiole is less due to which it offers more resistance to flow of air. The relationship between flow, pressure and resistance (F=?P/R).
Deoxygenated blood reaches the lungs via the PULMONARY ARTERY.
Pulmonary artery carries deoxygenated blood from right ventricle to lungs where the blood gets oxygenated.
This relationship (Poiseuille's equation) was first described b
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