A Mouse Is Immunized with the Tetanus Toxoid Protein (Inactivated

question 22

Multiple Choice

A mouse is immunized with the tetanus toxoid protein (inactivated toxin) in adjuvant. One week later, the entire population of splenic B cells are isolated from the mouse and mixed with tetanus toxoid-specific CD4 T_FH cells plus the purified tetanus toxoid protein. Four days later, the total number of B cells in the culture and the number of tetanus toxoid-specific B cells are determined and compared to the starting population on the day of isolation. The results are shown in Figure Q1) . B cells preferentially survive and proliferate because:

• A) They are the only B cells that express CD40.
• B) They are the only B cells that express the receptor for IL-21.
• C) They are the only B cells that proliferate in response to their antigen.
• D) They are the only B cells presenting the tetanus peptide to the T_FH cells.
• E) They are the only B cells that received a TLR stimulus during priming.

Describe and differentiate between various methods for establishing probabilities.

Comprehend the meaning and implications of probabilities valued at 1 and 0.

Interpret and use probability notation effectively.

Appreciate the multiplicity of ways probabilities can be expressed and understand the convertibility among these forms.

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Definitions:

IQ Score

A numerical value derived from standardized tests designed to assess human intelligence and cognitive abilities.

Environmental Factors

External elements including climate, geography, natural resources, and cultural elements that affect living organisms and human health.

Heritability

The proportion of observable differences in a trait among individuals within a population that are due to genetic differences.

Middle-Class

Refers to a social class between the working class and the upper class, often characterized by moderate income, education level, and occupational prestige.