Answer:
T helper (Th) cell polarization arises from programmed differentiation following T cell receptor (TCR) engagement by peptide antigen-major histocompatibility (MHC) complex.
False; shaking hands is not dangerous unless you both have open wounds and there is an opportunity for blood transfer & HIV/AIDS cannot be transferred through saliva, so no barriers are needed.
Answer:
Emotional and survival
Explanation:
it cant be executive because the frontal cortex is still growing so crying is associated with emotional but kids can also use it as survival
