Which of the Following Contribute to New Epidemics and the Long-Term

question 67

Multiple Choice

Which of the following contribute to new epidemics and the long-term survival of the influenza virus in the human population? (Select all that apply.)

• A)New viral strains possess epitopes not recognized by antibodies made in the previous epidemic.
• B)The first influenza strain provoking a primary immune response constrains the types of antibodies made during a subsequent encounter with a different strain.
• C)The virus loses the capacity to express hemagglutinin,thereby rendering neutralizing antibodies useless.
• D)The virus uses gene rearrangement to achieve antigenic variation,which creates new epitopes.
• E)The RNA genome of the influenza virus is subject to point mutations during viral replication.

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Definitions:

Amygdala

A part of the brain's limbic system involved in emotion processing, fear responses, and memory.

Endometrium

The mucous membrane lining the uterus, which thickens during the menstrual cycle in preparation for possible implantation of an embryo.

Hippocampus

A structure of the brain that is involved in memory formation.

Personal Fable

A belief held by adolescents that they are special and unique, leading to the notion that others cannot understand them and they are invulnerable to harm.