What is a CBC that doctor\'s often ask for? A) Count of Blood Complement B) Comp

Question

What is a CBC that doctor's often ask for? A) Count of Blood Complement B) Complete Blood protein Count C) Complete Blood and differential leukocyte Count D) Count of B cells and Cytotoxic T cells Cells secrete antimicrobial peptides when contact is made between microbial components such as lipotechoic acid, lipid A, or flagellin and which of the following? A) Complement B) Toll-like receptons C) CD95 D) MHC Class I molecules The coating of a microbe with opsonins like antibodies helps macrophages with what? A) chemotaxis B) engulfment C) expulsion D) recognition and adherence The first step of phagocytosis of a microbe by a white blood cell is: A) chemotaxis B) engulfment C) expulsion D) recognition and adherence Microbes that have been phagocytized are placed into what? A) Endoplasmic reticulum B) Phagosome C) Basal body D) None of the above Killing and destruction of a phagocytized microbe typically takes place in what structure? A) Phagolysosome B) Golgi apparatus C) Nucleus D) Exovesicle A person with eosinophilia has: A. a high number of eosinophils B. a helminth worm infestation like flukes or tapeworms C. extracellular killing going on D. All of the above A type of nonspecific defense that targets infected and tumor cells is: A. cytotoxic T cells B. plasma cells C. natural killer cells D. helper T cells

Explanation / Answer

CBC refers to complete blood count.

It shows cell count for each type of cell and concentrations of various minerals and proteins.

So, option C is correct.

TLR is component of innate immune system that recognizes specific patterns seen only in invading pathogens.

They can recognize ssRNA (viral origin), flagellin, lipotechoic acid and lipid A.

So, option B is correct.

Opsonization of a microbe helps macrophage to recognize and bind to it.

This ultimately leads to phagocytosis.

So, option D is correct.

The first step of phagocytosis is the activation of phagocytes and chemotaxis towards pathogens.

So, option A is correct.

Engulfment of a pathogen results in the formation of phagosome inside the phagocyte's cytosol.

So, option B is correct.

During the course of phagocytosis, phagosome fuses with lysosomes to form phagolysosome. This helps in the neutralization of the pathogen.

So, option A is correct.

Eosinophilia is characterized by elevated levels of eosinophils in the blood (> 450/uL).

Eosinophil count greatly increases after a Hemlinths infection. Extracellular killing of pathogens is also mediated by eosinophils.

So, option D is correct.

NK cells are non-specific.

So, option C is correct.

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