Which white blood cells function primarily as phagocytotic cells?
A. monocytes and lymphocytes
B. basophils and neutrophils
C. eosinophils and monocytes
D. neutrophils and monocytes
D
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The ________ is used by both the digestive and respiratory systems.
A. epipharynx B. oropharynx C. nasopharynx D. larynx
Osteoblasts produce two chemical signals that govern osteoclast development and activity in opposite ways: RANK ligand and __________
Fill in the blank(s) with correct word
Which is correct about the contraction ssequence of the heart?
a. The contraction of all four chambers happens at the same time b. The right atrium and ventricle contract at the same time, then the left atrium, then the left ventricle c. Contraction occurs in a series, whereby the the right atrium, then right ventricle, then left atrium, then left ventricle are activated sequentially d. The two atria contract at the same time, and as they are relaxing, the two ventricles contract together e. The atria and the ventricles begin their contraction at the exact same time, but the atrial contraction only lasts half as long as the ventricular contraction
Which taste sensation is produced by amino acids such as aspartic acid and glutamic acid?
A) Umami B) Sour C) Bitter D) Sweet E) Salty