Chem 219: Module 2 Exam Questions With 100% Correct Answers

Chem 219: Module 2 Exam Questions With 100% Correct Answers What kind of bond holds the heavy and light chains together in an antibody? disulfide bonds What substance is responsible for selecting the cell that will be cloned in the clonal selection of B cells? antigen Which of the following is true of clonal selection of T cells? Involves recognition of an antigen and an MHC protein of a body cell Which of the following lists the structures in the correct order in which air would travel from the outside to the lungs? Pharynx, larynx, trachea, bronchi, alveoli Which of the following describes the mucosa of the nasal cavity? It serves to warm, moisten and filter inhaled air What structure is responsible for routing food and air into the proper channels? Larynx Which of the following describes the pharynx? The auditory tube drains into the nasopharynx What tissue type lines the trachea? Pseudostratified ciliated columnar epithelium What is formed when oxygen binds with hemoglobin? Oxyhemoglobin Which of the following represents the mechanism of oxygen and carbon dioxide exchange in the lungs? diffusion What is the functional advantage provided by the C shaped cartilage rings of the trachea? The cartilage prevents the trachea from collapsing What is the exchange of gases between the blood and tissue cells called? Internal respiration The respiratory membrane is made up of what structures? Alveolar and capillary walls and their fused membrane Which of the following describes how breathing rate is controlled? Increase in hydrogen ions stimulate chemoreceptors Which of the following describes carbon dioxide gas in the blood? When it accumulates in the blood, the pH decreases Which of the following lists the structures in order from most superficial to most deep? Parietal pleura, pleural cavity, visceral pleura, alveoli Which of the following is associated with the right lung? middle lobe What is the process of air moving in and out of the lungs called? pulmonary ventilation What chemical lowers surface tension and increases the ability of the lungs to inflate? surfactant Which of the following events happen first in the process of pulmonary ventilation? Diaphragm and intercostals muscles contract What gas law explains the relationship between pressure and volume and explains the movement of air into the lungs? Boyle's What factor(s) are responsible for holding the lungs to the thorax wall? Surface tension from pleural fluid, positive pressure and atmospheric pressure on the thorax What is the 500 ml of air called that is inspired in a normal breath? tidal volume What is the respiratory quantity that represents the total amount of exchangeable air? vital capacity Inspiration occurs when innervated by nerve pulses from what area? THE MEDULLA What is the most important chemical stimulus leading to increased rate and depth of breathing? increased carbon dioxide in the blood Which of the following describes an increase in ventilation rate that results in an increase of pH? hyperventilation Which of the following describes perfusion? the flow of blood in pulmonary capillaries Which of the following describes continuous capillaries? Are characterized by a complete endothelium lining with tight junction