Physiology Quiz 10 May 5, 2016 cashstax Education Absorption is best described as the: reactions that break chemical bonds of food particles. passage of foods and liquids from one digestive organ to the next. movement of food particles through the wall of the alimentary canal. elimination of feces and some metabolic wastes. Carbohydrate digestion begins in the: stomach. mouth. small intestine. esophagus. What controls the passage of chyme from the last region of the stomach to the duodenum region of the small intestine? ileocecal valve gastroesophageal sphincter pyloric sphincter lower esophageal sphincter The digestion of which food group may be affected by an inadequate amount of stomach acid? starches proteins steroids lipids Which hormone stimulates the acinar cells of the pancreas to secrete digestive enzymes? insulin secretin cholecystokinin (CCK) glucagon What is responsible for the emulsification of lipids in the duodenum? bile secretin pancreatic juice cholecystokinin (CCK) What enzyme catalyzes reactions that initiate carbohydrate digestion? pepsin pancreatic amylase trypsin salivary amylase Cherise is lactose-intolerant because she produces insufficient amounts of an enzyme called: lactase. galactose. maltase. sucrase. Emulsification requires: bile salts. bile pigments. nuclease. enzymes. Which organ functions to absorb significant quantities of water, electrolytes, and vitamins? spleen stomach large intestine small intestine What part of the following description is INCORRECT? Contraction of the diaphragm and external intercostal muscles leads to increased volume in the thoracic cavity and the lungs. The increase in volume leads to an increase in intrapulmonary pressure causing air to move into the lungs. Increases in volume lead to a decrease in pressure, not an increase in pressure. The contraction of the diaphragm and external intercostal muscles leads to a decrease in volume, not an increase in volume. Increased volume and decreased pressure cause air to leave the lungs, rather than enter the lungs. The relaxation, not contraction, of the diaphragm and external intercostal muscles leads to inhalation. CHECK THIS OUT Physiology Quiz 12 Which of the following is a factor on which expiration depends? contraction of expiratory muscles increase in lung volume decrease in intrapulmonary pressure recoil of elastic tissue in the lungs Mr. Schmitzer has pulmonary fibrosis in which the elastic tissue of his lungs is replaced with dense irregular collagenous connective tissue. His condition primarily affects: pulmonary compliance. alveolar surface tension. airway resistance. surfactant production. What statement best describes tidal volume? Tidal volume is the air exhaled after normal inspiration. Tidal volume is the air exchanged during normal breathing. Tidal volume is the air remaining in the lungs after forced expiration. Tidal volume is the air forcibly expelled after normal expiration. Carbon dioxide has a relatively high solubility in blood plasma although it has a very low partial pressure. What law describes this phenomenon? Charles’ law Dalton’s law Henry’s law Boyle’s law What gas exchange problems do you expect to see when surface area is lost due to emphysema? hyperventilation eupnea hypocapnia both hypercapnia and hypoxemia What would increase the amount of oxygen unloaded by hemoglobin into peripheral tissues? decreased levels of PCO2 decreased pH decreased levels of BPG decreased temperature Which of the following counteracts the movement of bicarbonate ions from the RBCs? the chloride shift Dalton’s law the Bohr effect ventilation-perfusion matching If the dorsal respiratory group of neurons (DRG) was destroyed: a person would stop breathing. alveolar ventilation would increase. tidal volumes would diminish. pulmonary ventilation would increase markedly. Five year old Charlie is so mad that he’s holding his breath until he gets his way. What will stimulate his breathing rate to return to normal? lack of sensory information being sent to peripheral chemoreceptors lack of sensory information being sent to central chemoreceptors accumulation of carbon dioxide lack of oxygen CHECK THIS OUT How To Change Your Default Video Player On Windows!