Which of the following is(are) ionizing radiation?
A) Gamma radiation only
B) Cosmic radiation only
C) Both cosmic radiation and gamma radiation
D) Neither cosmic nor gamma radiation
C
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The function of surfactant is to
A) cause capillaries to adhere closely to the alveolar surfaces to promote gas exchange. B) cause diffusion. C) reduce the surface tension in the fluid coating alveolar surfaces to prevent alveolar collapse. D) phagocytize particulate matter that has eluded the respiratory defenses and reached the alveoli. E) None of the answers are correct.
____________________ refers to air in the pleural cavity
Fill in the blank(s) with correct word
Which of the following is (are) not part of the peripheral nervous system?
a. alpha motor neurons b. sympathetic nervous system c. spinal cord d. afferent division e. vagus nerve
Which cell has a very small, darkly staining nucleus?
a. Erythrocyte b. Normoblast c. Polychromatophilic erythroblast d. Proerythroblast e. Reticulocyte