The umbilical arteries carry
A. oxygen and nutrients toward the fetus.
B. waste and carbon dioxide toward the placenta.
C. waste and carbon dioxide toward the fetus.
D. oxygen and nutrients toward the placenta.
Answer: B
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a. a higher b. an equal c. a lower
What cell type gives rise to erythrocytes, platelets, granular leukocytes, and agranular leukocytes?
A) megakaryocytes B) B lymphocytes C) stem cells D) macrophages
The process of digesting food breaks large food particles into smaller particles. This example is best described as a(n):
A) anabolic reaction. B) neutralization reaction. C) exchange reaction. D) catabolic reaction.
The taste of salts results when ____ diffuses through channels leading to depolarization of the taste cell. Similarly, sour is tasted when ______ lead(s) to the depolarization of taste cells
A. umami, H+ B. Na+, amino acids C. Na+, H+ D. H+, G protein mechanism