Acquired Immunity I: Introduction to Lymphocytes

Concept: Intro to T and B Cells

4m

Concept: The T- and B-Cell Receptors

4m

Concept: Clonal Selection and Clonal Expansion

6m

Problem: An immunologist, as part of a research project, takes blood from a healthy, normal 21-year-old undergraduate student and separates out the B cells. The student has not had any illnesses recently. Which of the following accurately describes the B cell receptors (BCRs) on the B cells collected from the student?

2m

Problem: An immunologist, as part of a research project, takes blood from a healthy, normal 21-year-old undergraduate student and separates out the B cells. The student just recovered from a bout of influenza (she just started feeling better yesterday). Which of the following accurately describes the B cell receptors (BCRs) on the B cells collected from the student?

3m

Problem: A 10-year-old boy presents to his pediatrician in January with a 3-day history of fever, sore throat, cough, and body aches. His mother reports that three other kids in his class have had the same symptoms. The boy has not had any vaccinations for the last 3 years.

The doctor diagnoses influenza, a disease caused by a virus that the boy’s immune system has never seen before. Five days later the boy has fully recovered. Which of the following cell types primarily mediated this boy’s recovery this week? 

2m

Problem: Six other children in the boy’s class get sick with similar symptoms over the coming month. Although the boy plays Yu-Gi-Oh! with them at recess while they’re sick, he does not get sick again. Which of the following cell types primarily protected the boy from becoming sick a second time?

1m