Rickettsia Rickettsii Are Readily Phagocytized by Macrophages

question 59

Multiple Choice

Rickettsia rickettsii are readily phagocytized by macrophages.Why doesn't this control the infection and prevent the development of Rocky Mountain spotted fever?

• A)The bacteria interfere with the development of antibodies.
• B)The bacteria are toxic for T cells and prevent the development of cell-mediated immunity.
• C)The bacteria escape from the phagosome and reproduce in the cytoplasm of the phagocyte.
• D)The bacteria are unable to inactivate complement.

Discern the difference between the body forms and reproductive modes of cnidarians and their ecological roles.

Understand the functional groups in organic chemistry and their properties.

Comprehend the Brønsted-Lowry definition of acids and bases.

Describe the principles of acid-base organic extraction.

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Definitions:

Sympathetic Nervous System

Part of the autonomic nervous system that activates the body's "fight or flight" response during stress.

Fight-or-Flight

A physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival, preparing the body for either confrontation or avoidance.

Somatic

Relating to or affecting the body, especially as distinct from the mind.

Parasympathetic

Part of the autonomic nervous system responsible for regulating the body's rest and digest response.