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Select all that applyWhat can activate complement?Multiple select question.MBL proteinPathogen surface moleculesPhagocytosis

Question

Select all that applyWhat can activate complement?Multiple select question.MBL proteinPathogen surface moleculesPhagocytosis

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Solution

The complement system can be activated by several factors. Here are the options that apply:

  1. MBL protein: Yes, the Mannose-binding lectin (MBL) protein can activate the complement system. It is part of the lectin pathway where MBL binds to certain sugars on the surface of microorganisms and triggers complement activation.

  2. Pathogen surface molecules: Yes, pathogen surface molecules can activate the complement system. This is part of the classical pathway where antibodies bind to the surface of pathogens and trigger complement activation.

  3. Phagocytosis: No, phagocytosis itself does not activate the complement system. However, the complement system can enhance phagocytosis through a process called opsonization, where complement proteins bind to the surface of pathogens and make them more attractive to phagocytes.

So, the correct answers are MBL protein and Pathogen surface molecules.

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Similar Questions

Select all that applyWhich of the following are true of complement?Multiple select question.Its component proteins usually circulate freely in the blood plasma in inactive form.It is comprised of a group of proteins that are normally produced in all of the potential routes of entry for microbes.It is the main defense system of invertebrates.It is comprised of approximately 30 proteins.

The complement system consists of over 30 different proteins that work together in a cascade fashion to protect us against infectious agents. One way this system is activated is via the __________, when complement proteins are activated by directly interacting with a pathogen.ANSWERclassical pathwaycomplement pathwaylectin pathwayalternative pathway

Which of the following is NOT an effect of complement activation?Group of answer choicesBacterial cell lysisInterference with viral replicationOpsonizationIncreased phagocytic activityIncreased blood vessel permeability

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The complement system is actually composed of Blank______.Multiple choice question.antibodies that can be produced without help from T cellsa number of blood plasma proteinsmonocytes and natural killer cellscytokines secreted during parasitic infections

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