Which One of the Following Statements About the Molecules B7-1 $\gamma$

question 5

Multiple Choice

Which one of the following statements about the molecules B7-1 and B7-2 is NOT true?

• A)B7-1 and B7-2 expression on antigen-presenting cells (APCs)is upregulated by the presence of "danger" signals,such as lipopolysaccharide,as well as cytokines,such as interferon (IFN)-\(\gamma\)
• B)B7-1 and B7-2 are expressed at low levels on some resting APCs.
• C)Induction of B7-1 usually occurs before the induction of B7-2 in an immune response.
• D)B7-1 and B7-2 bind to CD28 on T cells and provide "second signals" for naive T cell activation.
• E)Activated helper T cells can induce expression of B7-1 and B7-2 on APCs via CD40L binding to CD40.

---

Definitions:

Anxious Attachment Style

A type of attachment characterized by worry and insecurity about being rejected or unloved, often resulting in clinging behavior.

Neuroticism

A personality trait associated with a higher likelihood of experiencing negative emotions such as anxiety, depression, and anger.

Avoidant Attachment

A pattern of attachment in which individuals actively maintain emotional distance from others and dismiss the importance of close relationships.

Strange Situation

The Strange Situation is a procedure developed by Mary Ainsworth in the 1970s to observe attachment relationships between a caregiver and child.