pt 3 test 4

Which of the following pairs of proteins shares the most overall similarity in structure?

B-cell receptors and antibodies

Which of the following is a difference between B cells and T cells?

One has a major role in antibody production, while the other has a major role in cytotoxicity.

Clonal selection is an explanation for how _____.

an antigen can provoke production of high levels of specific antibodies

Vaccination increases the number of _____.

lymphocytes with receptors that can bind to the pathogen

If a patient is missing B and T cells, what would be absent from the immune response?

memory

A certain cell type has existed in the blood and tissue of its vertebrate host's immune system for over twenty years. One day, it recognizes a newly arrived antigen and binds to it, subsequently triggering a secondary immune response in the body. Which of the following cell types most accurately describes this cell?

memory cell

An immunoglobulin (Ig) molecule, of whatever class, with regions symbolized as C or V, H or L, has a light chain made up of _____.

one C region and one V region

Immunological memory accounts for _____.

the ancient observation that someone who had recovered from the plague could safely care for those newly diseased