BIOL 235 FINAL EXAM QUESTIONS WITH 100% VERIFIED ANSWERS LATEST UPDATE

BIOL 235 final Exam SET 1 Venous blood returning from systemic circulation first enters the ___, proceeds to the ____, loses ___and gains ____ in the lungs, and then returns to the heart via the ____. a) right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary veins. b) Left atrium, left ventricle, pulmonary artery, CO2, O2, aorta c)Right atrium, right ventricle, pulmonary artery, O2, CO2, pulmonary veins d) Left atrium, right ventricle, pulmonary veins, O2, CO2, aorta - A. Right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary veins The upper respiratory tract differs from the lower respiratory tract in what way? A) air is taken in through the lower respiratory tract, and CO2/O2 are exchanged in the upper respiratory tract b) air is taken in through the upper respiratory tract, and CO2/O2 are exchanged in the lower respiratory tract c) CO2 is removed from circulation in the upper respiratory tract d) O2 is removed from circulation in the lower respiratory tract - B. Air is taken i n through the upper respiratory tract, and CO2/O2 are exchanged in the lower respiratory tract Smooth muscle surrounds which structure of the lower respiratory tract? a) Alveoli b) Alveolar capillaries c) Terminal bronchioles d) Trachea - C. terminal bron chioles In the alveolus, ____squamous epithelial cells are responsible for ___, while ___cells are responsible for ____. a) Type 1; surfactant secretion; Type 2, gas exchange b) type 1; debris removal; type 2; surfactant secretion c) type 3; debris remova l; type 1; gas exchange d) type 1; gas exchange; type 2: surfactant secretion - d) type 1; gas exchange; type 2: surfactant secretion There is no net air flow into or out of the lungs when a) P alveolus = P atmostpher b) P alveolus< P atmostphere c) P pleural wall > P atmostphere d) P atmosphere< P pleural wall - a) P alveolus = P atmosphere What keeps the lungs from collapsing BIOL 235 FINAL EXAM QUESTIONS WITH 100% VERIFIED ANSWERS LATEST UPDATE Check the - b) trans pulmonary negative pressure caused by negative pressure from pleural cavity Identify the correct s equence of events for inspiration a) diaphragm & inspiratory intercostals relax, lungs expand, air flows into alveoli b) diaphragm & inspiratory intercostals contract; lungs expand, air flows out of the alveoli c) diaphragm & inspiratory intercostals contr act, lungs expand, air flows into alveoli d)diaphragm & expiratory intercostals relax, lungs contract, air flows out of alveoli - c) diaphragm & inspiratory intercostals contract, lungs expand, air flows into alveoli the main determiners of lung complianc e are a) lung tissue thickness, surface tension of fluid on the inner lung surface b) lung tissue perforations, surface tension of fluid on the inner lung surface c) lung tissue surface area, surface tension of fluid on the inner lung surface d) lung tissu e thickness, surface tension of fluid on the outer lung surface - a) lung tissue thickness, surface tension of fluid on the inner lung surface lung compliance is defined as a) lung volume/ transpulmonary pressure b) transpulmonary pressure/ lung volume c) transthoracic pressure/ atmospheric pressure d) none of the above - d) none of the above trained athletes tend to have a) increased lung compliance b) normal lung compliance c) decreased lung compliance d) asthma - a) increased lung compliance which is true abbout the pleural sac a)it is continuous with the atmosphere and protects the lungs from infections b) it is a closed sac surrounding each lung and contains only a tiny volume of lubricating fluid c) it is a closed sac surrounding each lung and contain a large volume of surfactact d) it is a closed, air -filled space surrounding both lungs that has a negative pressure compared to atmospheric pressure - b) it is a closed sac surrounding each lung and contains only a tiny volume of lubricating f luid which structure is NOT part of the "anatomical dead space?" a) bronchiole b) trachea c) bronchus d)respiratory bronchiole - d)respiratory bronchiole the volume of air flowing into the alveoli during inhalation/inspiration is increased when there is an increase in which of these? a)air resistance b)the pressure gradiant from the atmosphere to the alveoli c) the pressure in the intrapleural space d) the curvature of the diaphragm - b)the pressure gradiant from the atmosphere to the alveoli under norma l circumstances, which of the following would result from an increase in transpulmonary pressure? a) inhalation/inspiration b) exhalation/expiration c) a collapsed lung d) emphysema - a) inhalation/inspiration which of the following statements about the response of arteriole smooth muscle to changing ocygen partial pressure is true? a) both systemic and pulmonary arterioles respond to a decrease in PO2 by constricting b) both systemic and pulmonary arterioles re spond to a decrease in PO2 by dilating c) systemic arterioles respond to a decrease in PO2 by dilating but pulmonary arterioles constrict in response to decreased PO d) systemic arterioles respond to a decrease in PO2 by constricting but pulmonary arteriol es dilate in response to decreased PO2 - c) systemic arterioles respond to a decrease in PO2 by dilating but pulmonary arterioles constrict in response to decreased PO during an unforced exhalation/expiration, which would NOT be true? a) alveolar pressure is greater than atmospheric pressure b) intrapleural pressure is greater than alveolar pressure c) intrapleural pressure becomes less negative d) the diaphragm relaxes - b) intrapleural pressure is greater than alveolar pressure which true regarding how gases dissolve in liquids? a0 the concentration of a gas in a liquid equilibrates to match the concentration of that gas in the air to which of the liquid is exposed b) different gasses have the same solubility in liquids c) the partial pressure of a gas in a liquid is equal to the amount greatly diffusing in the liquid plus the amount bound to large molecules within the liquid d) the partial pressure of a particular gas in a liquid equilibrates to match the partial pressure o that gas in the air to which the liquid is exposed - d) the partial pressure of a particular gas in a liquid equilibrates to match the partial pressure o that gas in the air to which the liquid is exposed which of these results from hyperventilation? a) increased alveolar PCO2 and de creased alveolar PO2 b) an increase in both PO2 & PO2 c) decreased alveolar PCO2 & increased alveolar PO2 d) a decrease in both alveolar PCO2 & PO2 - c) decreased alveolar PCO2 & increased alveolar PO2 In which form is most of the oxygen carried in arterial blood? a) bound to hemoglobin b) dissolved in the plasma c) dissolved in the cytosol of erthrocytes d) converted to HCO3 - a) bound to hemoglobin after CO2 is produced by tissues, in what form is most of that carbon transported th the lungs for r emoval from the body? a) as dissolved CO2 b) found to hemoglobin c) as H2CO3 d) as dissolved HCO3 - d) as dissolved HCO3 action potential in neurnos in the inspiratory center of the medulla result in ation potentials in the ____nerves to the diaphragm, which in turn cause ___ of the muscle, resulting in a/an____ in the volume of teh thoiracic cage. a) motor, contraction, decrease b? parasympathetic, contration, decrease c) sympathetic, contraction, increase D) motor, contraction, increase - D) motor, contraction, increase which is NOT a function of the kidneys in maintin homeostaisis? a) regulation of extracellular fluid osmolarity b) regulation of blood hydrogen ion concentration c) regulation of blood glu cose concentration d) regulation of extracellular fluid volume - c) regulation of blood glucose concentration which of the following does NOT correctly describe kidney function? a) they contribute significantly to long term regulation of arterial blood pr essure by maintaining the proper plasma volume b) they produce urine of a constant composition at all time, in order to maintain homeostasis of extra cellular fluid c) they excrete metabolic waste products d) the assist in maintaing proper acid base balance in the body - c) they excrete metabolic waste products the amount of a substance that is excreted in the urine is equal to the amount that is ___ plus the amount that is ___ minus the amount that is ____. a) filtered, reabsorbed, secreted b) reabsorbed, filtered, secreted c) secreted, reabsorbed, filtered d) filtered, secreted, reabsorbed - d) filtered, secreted, reabsorbed