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The first signal required to activate a T cell is MHC(Major Histocompatibility Complex) presenting an antigen(foreign peptide) to the T cell receptor.
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Is T cell activation antigen specific?
Yes. The first signal that a T cell receives from an antigen presenting cell (dendritic cell) is MHC presenting an antigen (foreign peptide). This gives the T cell specificity to this antigen.
What role do enzymes have the cell?
reduce the amount of energy required for activation
What are the double signals in T cell activation?
T cells receive 3 signals during activation:1. Major Histocompatibility Complex (MHC) presenting an antigen (foreign peptide) to the T cell receptor2. The co-stimulatory signal (B7 on the dendritic cell binding to CD28 on the T cell)The first signal ensures that the T cell is specific for the antigen it has been presented.The T cell cannot be activated without also recieveing the second signal. This is how the T cell checks that it has been presented an antigen by a "professional" antigen presenting cell.3. Cytokines (signalling molecules) are released by the dendritic cell - these cause the differentiation of the T cell
What is activation energy and how does it relate to cell metabolism?
activation energy is the amount of energy that is required for a reaction to start. Enzymes lower activation energy allowing metabolism to go at increased rates.
Which of the choices below is not a factor required for target cell activation by hormone receptor interaction?
A type of hormone
How do enzymes function in speeding up a chemical reaction within a cell?
They lower the activation energy required to perform the reaction.
What is a word that means a white blood cell that makes antibodies?
The word you are looking for is "lymphocyte." Lymphocytes are a type of white blood cell responsible for producing antibodies, which play a crucial role in the immune response against foreign substances in the body.
What is voice only activation with cell phones?
to unlock your phone you use voice activation
What transmits information into a cell by binding to signal molecules?
One of the most common molecules of the cell that transmit information from outside to inside are transmembrane receptors. Typically, a ligand will bind to to exterior portion and trigger receptor activation, leading to downstream signaling within the cell.
What would an enzyme do in a cell?
it lowers activation energy.
Does your cell phone have to be off in order for it to be activated?
Yes, your cell phone has to be on in order for them to send the activation through satillite and the phone sends it back to the satilitte so they can see on their side that you received the activation on your cell phone
What signal might be considered a growth stimulating signal for a yeast cell?
Ras2 might be considered a growth stimulating signal for a yeast cell. It stimulated PKA and MAPK activity in the cell.
