Which of the following statements concerning pulmonary surfactant is incorrect?
a. It is secreted by Type II alveolar cells.
b. It is deficient in newborn respiratory distress syndrome.
c. It promotes elastic recoil of the lungs.
d. It reduces the cohesive force between water molecules.
e. It reduces surface tension.
C
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Which is the correct sequence for differentiation of a red blood cell?
A. Hematopoietic stem cell, erythroblast, reticulocyte, erythrocyte B. Hematopoietic stem cell, erythroblast, erythrocyte, reticulocyte C. Hematopoietic stem cell, hemocytoblast, erythrocyte, erythroblast D. Hematopoietic stem cell, erythrocyte, hematoblast, erythroblast
The nucleus of an atom consists of
A) electrons. B) protons. C) neutrons. D) protons + neutrons. E) protons + electrons.
Where is the flexor carpi radialis?
a) D b) E c) F d) G e) H
The actual genetic constitution of an individual is its
A. structural gene. B. autosome. C. genotype. D. polygenic. E. y-linked.