BMS 300 Exam Questions (Correctly answered)

The predominant neurotransmitter receptor in muscle cells of the diaphragm is a : correct answers nicotine acetylcholine receptor During expiration and inspiration, the pressure inside the pleural sac bounded by the parietal and visceral mesothelium is more _______ than ________. correct answers a. negative, atmospheric presure b. negative, pressure in the alveoli In the Bohr effect, the histamine residues in hemoglobin bind H+. The source of these proteins is primarily from carbonic anhydrase acting on _______, and the effect of this H+ buffering is to _______ the affinity of iron in hemoglobin for O2. correct answers CO2, decrease Until the late 1930s, prolonged thoracic surgery was problematic because it required opening the pleural sac. Which of the following could have been used to solve this problem? correct answers a. place an airtight helmet on the patient and increase the pressure in the helmet above atmospheric pressure b. construct a room where the patients head was outside the room at atmospheric pressure in the room could be reduced with pumps In babies born prematurely, type II pneumocytes often fail to produce adequate amounts of surfactant. The lack of surfactant: correct answers a. increases alveolar surface tension c. increases elastic recoil During an asthmatic response to allergens, histamine is release. When the bronchiolar smooth muscle binds histamine, the muscles ______ to ________ the resistance to air flow is. correct answers contract, increase Compared to blood in the vena cava, you would expect the peripheral chemosensors in the carotid and aoritc bodies to monitor blood that is: correct answers a. higher in O2 d. lower in CO2 In mammals, most of the ammonia, which is the result of metabolizing ___________, is converted to __________ in the liver. correct answers protein, urea The driving force that moves water from the luminal to the basolateral side of the epithelial cells in the proximal convoluted tubule results from: correct answers a. a lower water concentration on the basolateral side of the epithelial cells b. the effects of Na/K ATPase pumps moving Na+ from the epithelial cell cytoplasm into the extracellular space on the basolateral side of the cell