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.
As soon as the death as possible. Parents will most likely need help to deal with the shock of this sudden death.
Answer:Remove him from the environment, since the gases of huffing tend to remain in the area.
B.
Administer high-flow oxygen via nonrebreather mask at 15 lpm.
C.
Protect his airway, and begin assisting his ventilations with oxygen.
D.
<h3>
Seek permission from his parents to begin treatment.</h3>
<span>No . answer is C . Metamorphic rock
why because is - Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (150 megapascals (1,500 bar)),
causing profound physical or chemical change</span>
