External respiration refers to
A. atmospheric air coming into the lungs.
B. gas exchange between the lungs and the blood.
C. gas exchange in the atmosphere.
D. gas exchange between the blood and body tissues.
E. cellular respiration.
B
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The second signal during cytotoxic T-lymphocyte activation involves stimulation of the cell by interleukin 2 released by helper T-lymphocytes
Indicate whether this statement is true or false.
Which is not part of the conducting portion of the respiratory system?
A. Bronchi B. Larynx C. Trachea D. Alveoli E. Nasal cavity
Which of the following is NOT part of the respiratory membrane?
A. simple squamous epithelium of the alveolus and its basement membrane B. interstitial space C. pulmonary capillary simple squamous epithelium and its basement membrane D. thick layer of mucus lining the alveolus
It is wise to study anatomy alongside with physiology because ________
A) it makes for more efficient use of students' and teachers' time B) physiology is only explainable in terms of the underlying anatomy C) anatomy and physiology are practically the same thing D) to understand anatomy requires complete understanding of physiology