The Direct Consequence of a CD40 Protein on a B

question 27

Multiple Choice

The direct consequence of a CD40 protein on a B cell binding to a CD40 ligand on a T cell is

• A) initiation of an intracellular signal required for B cell activation.
• B) heavy-chain class switching in the B cell.
• C) release of IL-2 from the T cell.
• D) release of perforins and granzymes from the T cell.

---

Definitions:

Escort Agencies

Businesses that provide escort services for clients, typically involving companionship but may also include sexual services.

Call Girls

Sex workers who are contacted primarily through phone calls or the internet for appointments.

Social Stigma

The disapproval or discrimination against individuals or groups based on perceivable social characteristics that serve to distinguish them from other members of a society.