The alternative pathway of complement activation has an important role in innate immunity, due to its ability to greatly amplify the amount of C3b deposited onto the pathogen surface. This amplification occurs because:

Which complement component is common to both alternate and classical pathways?

Systemic TNF-α causes which of the following?

C5b6789 is the membrane attack complex when complement is activated

Multiple choice: Epithelial surfaces provide the first line of defense against infection by the use of several types of mechanisms. One of the chemical mechanisms used by epithelia is

A transplant patient began to show signs of rejection 8 days after receipt of a transplanted organ. What immune elements might be found in the rejected organ?

In patients with lymphomas, the cancer cells invade the bone marrow and destroy the environment required for normal hematopoiesis. This leads to bone marrow failure, which disrupts the production of hematopoietic cell lineages. All of the following cell types would be affected by this EXCEPT

The father of Immunology is known as:

Several subsets of innate lymphoid cells (ILCs) have been identified that share their patterns of cytokine production with the known subsets of T cells. The combined activity of related ILC and T cell subsets is effective in eradicating pathogenic infections because:

The first and most important barrier for keeping pathogens out of the human body is: