Which statement best describes an antibody?

The part of an antibody that directly binds to an antigen is the:

Which immunoglobulin is most associated with mucosal secretions such as saliva, tears, and breast milk?

In the blood coagulation reaction the protein ___________causes the conversion of fibrinogen to ______________________

Hemoglobin contains the mineral __________ and allows haem part red blood cells to bind to  __________.

Oxygen binds to ___________part of the red pigment while CO2 binds to the ___________

Blood is a type of __________ tissue and has ___________ as the extracellular matrix

A patient has an abnormally low platelet count. Which complication is most likely?

B cells are primarily responsible for __________ immunity, while T cells are primarily responsible for _________ immunity.

Which immunoglobulin can cross the placenta and provide passive immunity to a fetus?