When they leave the red marrow, pre-T-lymphocytes have
A. only the CD4 protein.
B. only the CD8 protein.
C. both the CD4 and CD8 proteins.
D. neither the CD4 nor CD8 protein.
E. either the CD4 or CD8 protein.
C
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Identify the auditory ossicles
a) A, B, C b) A, C, G c) A, B, J d) J, C, G e) C, D, G
Given the pressures listed, identify the respiratory event being measured. Transpulmonary pressure = 15 mmHg Intrapleural pressure = 765 mmHg Atmospheric pressure = 755 mmHg Intrapulmonary pressure = 750 mmHg
A. Forced expiration B. Tidal expiration C. Tidal inspiration D. Forced inspiration
A unique aspect of hematopoiesis is that
A) white blood cell production always results in the same proportion of leukocytes. B) lymphocytes never die. C) white blood cell development varies with the specific needs of the body. D) neutrophils direct all development from the lymph nodes.
Which muscle pulls the skin of the chin upward?
A. Depressor anguli oris B. Mentalis C. Depressor labii inferioris D. Platysma E. Masseter