-After a Long and Cold Winter, Jim Was Excited to Start

question 69

Multiple Choice

-After a long and cold winter, Jim was excited to start exploring the woods behind his new home. His first adventure included exposure to poison ivy without any reaction. A month later, though, a second walk through the woods was not so great, since two days later Jim had a terrible rash that lasted for weeks. The fact that the rash took two days to develop indicates that this immune response was an example of

• A) humoral immunity.
• B) cell-mediated immunity.
• C) innate immunity.
• D) the activation of Toll-like receptors.
• E) the activation of the complement system.

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Definitions:

Independent Samples T-Test

A statistical test used to determine if there are significant differences between the means of two unrelated groups on a continuous outcome.

Statistically Significant Difference

A difference between two groups or variables that is unlikely to have occurred due to chance alone, as determined by statistical analysis.

Consumers

Individuals who purchase goods and services for personal use.

Sample Size

The number of observations or elements selected from a population to be included in a statistical sample.