How Do Some Pathogens Prevent Complement Activation or Avoid the Effects

question 52

Multiple Choice

How do some pathogens prevent complement activation or avoid the effects of activated complement?

• A) Some pathogens produce C5a peptidase that destroys complement C5a, a chemoattractant that recruits phagocytes to the area of infection.
• B) Some pathogens hijack the host's regulatory membrane proteins that inactivate C3b, preventing the triggering of the alternative activation pathway.
• C) Some pathogens produce C5a peptidase that causes destruction of phagoctyes recruited to the area of infection.
• D) Some pathogens hijack the host's regulatory membrane proteins that inactivate C3b, preventing the triggering of the alternative activation pathway AND some pathogens produce C5a peptidase that destroys complement C5a, a chemoattractant that recruits phagocytes to the area of infection.
• E) Some pathogens hijack the host's regulatory membrane proteins that inactivate C3b, preventing the triggering of the alternative activation pathway AND some pathogens produce C5a peptidase that causes destruction of phagoctyes recruited to the area of infection.

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Definitions:

ABAB Design

A research design for evaluating the effect of a treatment by repeatedly alternating between a baseline period and a treatment phase.

Therapeutic Intervention

A strategic action or treatment, often within the context of psychotherapy, designed to help individuals overcome issues or attain better functioning.

Intervention Effect

The outcome or change resulting from a specific action or intervention, often used in the context of clinical trials or social science research to assess the impact of treatments or interventions.

Positive Reinforcers

Stimuli that, when presented after a behavior, increase the likelihood of that behavior being repeated.