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Use the following information to answer the following questions.
An otherwise healthy student in your class is infected with EBV, the virus that causes infectious mononucleosis. The same student had already been infected when she was a child, and she had merely experienced a mild sore throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick.
-The following events occur when a mammalian immune system first encounters a pathogen. Which shows the correct sequence in which they occur?
I. Pathogen is destroyed.
II. Lymphocytes secrete antibodies.
III. Antigenic determinants from pathogen bind to antigen receptors on lymphocytes.
IV. Lymphocytes specific to antigenic determinants from pathogen become numerous.
V. Only memory cells remain.
Male-female Intercourse
A biological process involving a sexual act between a male and a female, often resulting in reproduction.
Emerging Adulthood
A phase of the life span between adolescence and full-fledged adulthood, typically ranging from late teens through the twenties.
Young Adulthood
A life stage characterized by the transition into full independence, exploring personal and financial milestones, typically ranging from late teens to mid-20s.
Middle Adulthood
A developmental stage typically occurring between ages 40 and 65, characterized by personal and professional growth, awareness of mortality, and changes in physical abilities.
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