The picture shows a T cell (on top) interacting with another cell, labeled with a question mark (?). The arrow indicates _______ TCR and the cell interacting with a T cells could be a _______.1 pointan αβ; healthy macrophagean αβ; viral-infected red blood cellan αβ; viral-infected B cella γδ; healthy macrophagea γδ; viral-infected red blood cella γδ; viral-infected B cell

The picture shows a T cell (on top) interacting with another cell, labeled with a question mark (?). The arrow indicates _______ TCR and the cell interacting with a T cells could be a _______.

__________ are the most abundant T cells, and their function is to __________.ANSWERT helper cells (CD4+); activate B cells to stimulate the humoral branch of adaptive immunityT cytotoxic cells (CD8+); directly destroy cells that are virus-infectedT helper cells (CD4+); coordinate the adaptive immune responseT cytotoxic cells (CD8+); seek and destroy cancer cells

A patient found to have an abnormally low number of helper T cells in her blood contracts a bacterial infection.  During the infection, which of the following is most likely NOT affected by the patient's low count of helper T cells?A.Expression of major histocompatibility complex proteins that present bacterial antigens on the membrane of infected host cellsB.Proliferation of B lymphocytes in response to the bacterial infectionC.Levels of circulating antibodies against the invading bacteriumD.Activation of apoptosis-inducing cytotoxic T cells

Compared to the MHC molecule on the left, the MHC molecule on the right (in the drawing above) will bind a ______ peptide that, if foreign, will cause a T cell to activate and _________. The protein on the left is made up of two peptides, each with two domains. One peptide has domains labeled alpha 1 and 2, the other beta 1 and 2. The protein on the right is made up of two peptides, one with three domains labeled alpha 1, 2 and 3 and the other a single domain labeled beta MG.

CD 1 has an alpha chain and a _______ and presents lipids to ________ cells.1 pointβ chain; TH and γδTβ chain; TCβ microglobulin; TH and γδTβ microglobulin; TC