#Question id: 1563
#Unit 4. Cell Communication and Cell Signaling
A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to ________.
#Question id: 1564
#Unit 4. Cell Communication and Cell Signaling
When antibodies bind antigens, the clumping of antigens results from ________.
#Question id: 1565
#Unit 4. Cell Communication and Cell Signaling
Which of the following are symptoms of inflammation that might appear in such art?
#Question id: 1566
#Unit 4. Cell Communication and Cell Signaling
Histamines trigger dilation of nearby blood vessels, and increase in their permeability. Which of the signs of inflammation are therefore associated with histamine release?
#Question id: 1567
#Unit 4. Cell Communication and Cell Signaling
Which of the following cell types are responsible for initiating a secondary immune response?
#Question id: 1568
#Unit 4. Cell Communication and Cell Signaling
which one of these is not a characteristics of B-cell?