Lymph is filtered by the ________.
A. lymph nodes
B. tonsils
C. spleen
D. thymus
Answer: A
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What is the most significant factor in the formation of a covalent bond?
A. the attraction of a hydrogen atom's nucleus to the nucleus of another atom B. the transfer of one or more protons from one atom to another C. the complete transfer of one or more electrons from one atom to another D. the sharing of electron pairs between two atoms
Even the most forceful exhalation leaves air in the lungs; this is called the ______ and is needed to _______.
A. tidal volume; acquire adequate O2 B. vital capacity; remove adequate CO2 C. functional residual capacity; keep alveoli patent D. residual volume; keep alveoli patent
According to the two-cell mechanism of follicular estrogen synthesis:
A. granulosa cells synthesize an androgen, which the theca cells convert to estrogen. B. Sertoli cells synthesize an androgen, which the granulosa cells convert to dihydrotestosterone. C. theca cells synthesize an androgen, which luteal cells convert to estrogen. D. production of progesterone by the corpus luteum requires cooperative interaction between two cell types. E. theca cells synthesize an androgen, which the granulosa cells convert to estrogen.
Which is not a step in hemostasis?
a. vascular spasm b. platelet aggregation c. coagulation d. thrombopoietin activation e. fibrinogen activation