Which of the following statements is true?Macrophages do not express any MHC molecules on their surface.Macrophages express both class I and class II MHC molecules.Macrophages only express class I MHC molecules.Macrophages only express class II MHC molecules.
Question
Which of the following statements is true?Macrophages do not express any MHC molecules on their surface.Macrophages express both class I and class II MHC molecules.Macrophages only express class I MHC molecules.Macrophages only express class II MHC molecules.
Solution
The true statement is: Macrophages express both class I and class II MHC molecules.
Here's why:
Macrophages are a type of white blood cell that plays a crucial role in the immune response. They are considered antigen-presenting cells (APCs), which means they can ingest, process, and present antigens to T cells in the immune system.
To do this, they use molecules called Major Histocompatibility Complex (MHC) molecules. There are two classes of MHC molecules - class I and class II.
Class I MHC molecules are found on almost all nucleated cells, including macrophages. They present antigens to cytotoxic T cells.
Class II MHC molecules, on the other hand, are typically found only on certain cells of the immune system, including macrophages. They present antigens to helper T cells.
Therefore, macrophages express both class I and class II MHC molecules on their surface.
Similar Questions
Regarding the major histocompatibility class II (MHC II) molecule, which of the following statements is TRUE?Select one alternative:Each MHC II molecule can present only one specific (cognate) antigen.MHC II molecules present endogenous antigens, from within the cell.MHC II is expressed on all nucleated cells in the body.Antigenic peptides are anchored along the peptide binding groove in MHC II.
________ cells will have both MHC I and II, _______ will have II but not I and _______ will have neither MHC I nor II.1 pointT; no cells; erythrocytesT; macrophages; liver cellsB; no cells; spermB; macrophages; erythrocytesSentinel dendritic; no cells; liver cellsSentinel dendritic; macrophages; sperm
Which of the following cell types does not express MHC class I?Group of answer choiceserythrocytehepatocytelymphocytedendritic cellneutrophil
Which of the following statements about phagocytes is TRUE?Select one alternative:Macrophages can undertake repeated phagocytosisPus is formed predominantly from dead macrophagesNeutrophils require activation before they are effectiveNeutrophils are long living cells
Which of the following statements about the immune system is/are true?Question 2Select one or more:a.Phagocytosis is the process by which certain cells, such as macrophages and neutrophils, engulf and digest foreign particles, bacteria, and dead or dying cells.b.Adaptive immunity is faster-acting than innate immunity.c.The immune system uses chemokines to attract cells such as neutrophils.d.Immune cells can communicate with each other by binding to receptors on each other’s surfaces.e.The immune system uses cytokines for communication over short distances.
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