AP BIOLOGY

THE CELL

CELL COMMUNICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What do killer T-cells do?
A
Kill all of the helper T-cells.
B
Create antibodies to be produced into the blood stream.
C
Destroy cells that have been infected.
Explanation: 

Detailed explanation-1: -A type of immune cell that can kill certain cells, including foreign cells, cancer cells, and cells infected with a virus. Killer T cells can be separated from other blood cells, grown in the laboratory, and then given to a patient to kill cancer cells.

Detailed explanation-2: -The textbook view of how T cells kill is that they essentially lock horns with a target cell (using a special receptor) and then release a toxic payload of a molecule called perforin, which literally pokes holes in the cell and causes it to self-destruct. It’s considered a chemical process.

Detailed explanation-3: -Cytotoxic CD8 T cells can induce apoptosis in target cells. Specific recognition of peptide:MHC complexes on a target cell (top panels) by a cytotoxic CD8 T cell (CTL) leads to the death of the target cell by apoptosis.

Detailed explanation-4: -Activated CAR T cells multiply and signal to other parts of the immune system to come to the site of the cancer cell. These signaling proteins are called cytokines. All of these cytokines and activated T cells then cause significant inflammation focused at the cancer cell, which causes the cancer cell to die.

Detailed explanation-5: -Cytotoxic T-cells are a type of immune cell. They destroy cells infected with viruses. Another name for cytotoxic T-cells is killer T-cells. Cytotoxic T-cells are one of the three main types of cells developed in your thymus.

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