Arrange the following structures in the order air passes through them during inhalation: 1: alveolar ducts 2: alveolus 3: respiratory bronchiole 4: terminal bronchiole a. 1, 2, 3, 4b. 2, 1, 3, 4c. 4, 3, 1, 2 d. 3, 2, 1, 4 e. 4, 3, 2, 1 Most carbon dioxide is transported in the blood […]
What does “A” represent on the diagram? a. spleenb. thymusc. axillary lymph node d. inguinal lymph node e. thoracic duct Ventilation refers to the a. movement of air into and out of the lungsb. gas exchange between the blood and the tissuesc. transportation of oxygen and carbon dioxide in the blood d. gas exchange between […]
The structure in the thymus that prevents foreign substances from entering the thymus is the a. thymic corpuscle barrier b. blood-thymic barrier c. surface membrane barrier d. capsular barrier e. thymic filter Adaptive immunity is stimulated by a. Antigensb. Histaminesc. Antibodies d. Complement e. plasma proteins
When the blood pressure of a vessel drops below the critical closing pressure for that vessel, a. there is hypertensionb. there is an increase in blood flowc. there is an increase in peripheral resistance d. the vessel collapses e. the vessel expands The lymphatic system differs from the cardiovascular system in that a. the lymphatic […]