Which of the Following Statements Concerning Immunity Is Correct

question 169

Multiple Choice

Which of the following statements concerning immunity is correct?

• A) Adaptive immunity responses to pathogens improves over time due to generation of memory, which includes an increase in the number of lymphocytes that respond faster than during the original infection.
• B) Adaptive immunity demonstrates memory, meaning each lymphocyte responds to a particular pathogen, but responds similarly with each infection.
• C) Adaptive immunity demonstrates specificity, which means that lymphocytes only destroy viruses and ignore all other types of pathogens.
• D) All of the choices are correct.

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Definitions:

Jump-To-Label Program

A programming construct that allows the execution sequence to jump to a specified point in the code, identified by a label.

NC Contact

An electrical contact that remains closed, allowing current to flow, until actuated open, usually referred to as a Normally Closed Contact in electrical circuits.

PLC System

A PLC system encompasses the hardware and software components of a Programmable Logic Controller, including the CPU, input/output modules, power supply, and the programming environment used to automate industrial and manufacturing processes.