Amplification steps in the complement pathways occur
a. in the classical pathway with C1 cleaving multiple molecules of C4 and multiple C2 for every C1 and C4; in the alternative pathway with the C3b of other pathways becoming C3 convertase; and then the C3b becoming part of a C5 convertase
b. in all pathways with all the C3 convertases making multiple C3a +C3b
c. with C9 polymerization
d. all of the above
e. A and B only
D
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The reason why babies born to mothers with Graves' disease suffer passively from the disease for only a short while after birth is that _____
a. very little IgM is transported across the placenta b. only antibodies, and not the B cells making the autoantibodies, cross the placenta c. the newborn's regulatory T cells suppress autoantibody production d. the newborn's thyroid gland develops resistance to the effects of maternal autoantibodies e. thyroglobulin synthesis does not commence until months after birth.
Why is work important for meaningfulness in life?
Which is NOT an essential component of a quality physical education program?
a. Student-centered b. Teacher-centered c. Physical activity at the core d. Inclusion of all students
Exercising even when injured is common in people who suffer from an exercise compulsion
Indicate whether the statement is true or false