Answer:
1) cortical epithelial cells; (2) macrophages and dendritic cells
Explanation:
T cells, also known as T lymphocytes, are a fundamental type of cell of the immune system that determines the specificity of the immune response to specific foreign particles (antigens). T cells are produced in the Thymus (it is for that reason that they are called T cells) and then circulate throughout the bloodstream in order to recognize specific antigens in association with major histocompatibility complex (MHC) molecules on the surface of antigen-presenting cells (APC), such as macrophages and dendritic cells. T cells undergo positive and negative selection: 1- positive T-cell selection refers to the process by which T cells bind cortical epithelial cells that express Class I or Class II MHC molecules with enough affinity to get a survival signal; whereas negative selection occurs when T cells bind to macrophages and dendritic cells that express MHC specific receptors with a strong enough affinity to get an apoptosis (programmed cell death) signal.
Hello there!
You can learn his/her personality traits.
Hope this helps you!
~Galexie
Triggers are the things that make you want to
smoke. Different people have different triggers, like a stressful
situation, sipping coffee, going to a party, or smelling cigarette
smoke.
Answer:
B
Explanation:
television is a type of media
Answer: Thermal Burns.
Explanation: An electric shock can produce in anything from a small tingling feeling to instant cardiac restraint. A thermal burn is a kind of burn occurring from getting touch with heated things, such as boiling water, steam, hot cooking oil, fire, and hot things. Scalds are the usual popular sort of thermal burn experienced by kids, but for grown-ups, thermal burns are most usually generated by the fire.