The following statements concerning T-cell B-cell cooperation are true: T_H cell

Question

The following statements concerning T-cell B-cell cooperation are true: T_H cells produce soluble factors that induce B cells to proliferate. both carrier and haptenic determinants have to be present on the same antigen molecule. T_H cells can be activated by presentation of carrier determinants by M HC class II on B cells. T_H cells must be in direct contact with B cells to induce the B cells to proliferate. All of the above. None of the above An 8 month old baby has a history of repeated gram-positive bacterial infections. The likely cause(s) for this condition is/are: The mother did not confer sufficient immunity to the baby in utero. erythroblastosis, fetalis, or hemolytic disease of the newborn. defect in the alternative complement pathway. The baby is allergic to mother's milk. All of the above None of the above. Severe illness upon administration of attenuated (weakened) live virus vaccine to an apparently healthy toddler is indicative of SCID (severe combined immunodeficiency disease, genetic disorder resulting in lymphocyte dysfunction) inappropriate B cell differentiation inadequate T cell differentiation complement deficiency higher genetic susceptibility to tumorogenicity all of the above none of the above

Explanation / Answer

11. All the given option are correct regarding T-cell and B-cell cooperation

12. If the baby is having repeated infection of gram-positive bacteria then this may be because Mother did not confer enough immunity in the uterus

13. Severe illness upon administration of attenuated live virus vaccine to an apparently healthy toddler is indicative of inappropriate B-cell differentiation as the are related to recognition of infectious receptor

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