micro biology questions

Need some help with the following:

5) What causes the increase in interstitial osmotic pressure that occurs during edema?
A) stimulation of sensory neuronsB) recruitment of leukocytes C) leukocyte migration D) decreased blood flow E) increased capillary permeability

6) In order to mount a response, particular B or T cells must express the appropriate ________ that will bind to the ________.
A) antigenic determinant : antigen
B) epitope : antigen
C) antigen : antibody
D) antigen : antigen receptor
E) antigen receptor : antigen
17) What type of cell, once it enters the tissues, is converted into a macrophage that attacks invaders by phagocytosis?
A) lymphocyte   B) eosinophil   C) basophil   D) neutrophil E) Monocyte