Immunology Quiz #16: Immune Cell Surface Proteins

1. A 25-year-old male presents with recurrent bacterial and fungal infections. Laboratory studies reveal a deficiency in a cell surface protein crucial for the adhesion of leukocytes to endothelial cells during the inflammatory response. Which of the following proteins is most likely deficient in this patient? 

Question 1 of 5

2. A researcher is studying a molecule on the surface of T cells that recognizes and binds to B7 molecules on antigen-presenting cells. This interaction provides a necessary co-stimulatory signal for T cell activation. Which of the following molecules is the researcher most likely studying? 

Question 2 of 5

3. A 30-year-old woman is diagnosed with a type of cancer that is known to evade the immune system by expressing a ligand that binds to an inhibitory receptor on T cells, reducing their activity. Which of the following pairs of ligand and receptor is most likely involved in this immune evasion? 

Question 3 of 5

4. A new laboratory test is developed to measure the activity of a surface protein found on macrophages that plays a crucial role in the presentation of antigen to CD4+ T cells. Dysfunction of this protein is associated with impaired cellular immunity. Which of the following surface proteins is the test most likely measuring? 

Question 4 of 5

5. During a routine examination, a 40-year-old male is found to have an elevated number of a particular type of white blood cell that expresses a surface protein known for its role in antibody-dependent cell-mediated cytotoxicity (ADCC). Which of the following surface proteins is most likely being described? 

Question 5 of 5


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