★ Skin Structure and Growth Quiz
The stratum germinativum is composed of several layers with special cells that produce a dark skin pigment called:
A. granules
B. melanin
C. elongated
D. keratin
Select your answer:
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Immunology: T cell Development › ViewWhich receptor signaling commits the progenitor cell to the T lineage?
A. Notch 1
B. not this
Biotechnology › View
What is the function of a Helper T cell in the immune system?
A. Specifically recognizes and kills “altered-self” cells
B. Binds specific soluble antigens with its membrane-bound antibody
C. Specifically recognizes foreign peptides on antigen-presenting cells
D. Rapidly recognizes and kills virally infected or tumor cells