Question

In: Biology

Which of the following is NOT an accurate description for epithelial cells? a. interconnected c. held...

Which of the following is NOT an accurate description for epithelial cells?

a.

interconnected

c.

held together by tight junctions

b.

symmetrical

d.

glycoprotein-covered

Lipopolysaccharides, flagellin, and double-stranded DNA are microbe-associated molecular patterns recognized by

a.

tight junctions.

c.

tumor necrosis factors.

b.

ribosomes.

d.

pattern recognition receptors.

Which of the following statements is true?

a.

Type I and type II interferons have the same effect on the body.

b.

Interferon-alpha promotes phagocytosis.

c.

Type II interferons increase MHC antigens on the surface of macrophages.

d.

Interferon-gamma is a type I interferon.

The classical, alternative, and lectin complement pathways all converge with the activation of

a.

C1.

c.

C3.

b.

C2.

d.

C5.

Which of the following statements is true?

a.

Macrophages interact with inhibitory glycoproteins to recognize self.

b.

Phagocytosis is a specific immune response.

c.

Opsonization prevents phagocytosis.

d.

Capsules enhance phagocytosis.

Which nonspecific defense mechanism is mismatched with its associated body structure or body fluid?

a.

lysozyme—tears

c.

keratin—skin

b.

acidic pH—stomach

d.

Langerhans cell—lungs

Gut-associated lymphoid tissue (GALT) includes all of the following EXCEPT

a.

tonsils.

c.

M cells.

b.

adenoids.

d.

alveolar macrophages.

Solutions

Expert Solution

answer 1 :- glycoprotein covering. as we can found this covering in different other cells also , like bacterial cell.

answer 2 :- pattern recognition receptor ; it is a proteins capable of recognizing molecules frequently found in pathogens . On bacterial cell we foun flagellin and lipopolysaccharides on its cell membrane.

answer 3 :- interferon alpha promotes phagocytosis of viral attacked cells. Type I interferon (IFN-alpha and IFN-beta) is secreted by virus-infected cells while type II, immune or gamma interferon (IFN-gamma) is mainly secreted by T cells, natural killer (NK) cells and macrophages.

answer4 :- C2 , The lectin pathway is a type of cascade reaction in the complement system, similar in structure to the classical complement pathway. it proceeds through the action of C4 and C2 to produce activated complement proteins further down the cascade.

answer 5 :- macrophages interact with glycoprotein to recognise self . As macrophages have pattern recognition receptor protein with the help of it , differentiate the self and forein cell.

answer 6:- langerhance cells and lungs . langerhance cells present in pancrease.

answer 7 :- alveolar macrophges. it is a part of lungs and not gut


Related Solutions

Which of the following is an accurate description of tRNA?
Which of the following is an accurate description of tRNA?1-The type of RNA that is translated to produce a peptide or protein.2-The type of RNA that interacts with mRNA and has an amino acid covalently attached.3-None of the other choices is correct.4-The type of RNA that forms part of the protein-synthesizing machinery (i.e. the ribosome) of the cell.5-   The type of RNA that silences gene expression.
Which of the following is an accurate description of equity of redemption? a. A buyer in...
Which of the following is an accurate description of equity of redemption? a. A buyer in default purchases their property after a foreclosure sale for the full amount of the original purchase price. b. A seller demands that a buyer in default pay the full amount of outstanding debt on a mortgaged property. c. A buyer in default pays the full amount of outstanding debt on a mortgaged property, plus interest and other associated costs, after the foreclosure sale. d....
Which of the following statements is the most accurate description of limited liability? A. In a...
Which of the following statements is the most accurate description of limited liability? A. In a company limited by shares, shareholder who holds a share in the company is not liable beyond any amount outstanding on partly paid shares. B. In a company limited by shares, a company has limited liability for their debts. C. A company is a separate legal entity from its directors, so directors are always shielded from the company's losses. D. A and B above. E....
Which of the following is an accurate description of statutory redemption? a. A seller demands that...
Which of the following is an accurate description of statutory redemption? a. A seller demands that a buyer in default pay the full amount of outstanding debt on a mortgaged property. b. A buyer in default pays the full amount of outstanding debt on a mortgaged property, plus interest and the other associated costs, after the foreclosure sale. c. A buyer in default purchases their property after a foreclosure sale for the full amount of the original purchase price only....
Which of the following is the most accurate description of an organism’s direct fitness? A. Its...
Which of the following is the most accurate description of an organism’s direct fitness? A. Its reproductive success measured by number of their offspring that also reproduce. B. The sum of the organism’s strength and stamina. C. The ability of the organism to survive in the face of predators, disease, parasites, and competition. D. How well an organism blends into its environment to escape detection. E. None of the above is related to direct fitness. Which of the following is...
Which of the following does not provide an accurate description of refundable​ taxes? A. The basic...
Which of the following does not provide an accurate description of refundable​ taxes? A. The basic concept of refundable taxes is that a portion of the corporate tax paid on investment income is refunded to the corporation when the income is distributed to shareholders in the form of dividends. B. One purpose of refundable taxes is to keep corporate tax rates high to discourage accumulation of investment income in a corporation. C. The only purpose for refundable taxes is to...
QUESTION 14 Which of the following statements is the most accurate description of limited liability? A....
QUESTION 14 Which of the following statements is the most accurate description of limited liability? A. In a company limited by shares, shareholder who holds a share in the company is not liable beyond any amount outstanding on partly paid shares. B. In a company limited by shares, a company has limited liability for their debts. C. A company is a separate legal entity from its directors, so directors are always shielded from the company's losses. D. A and B...
Which of the following types of cells are antigen-presenting cells? A. Lymphocytes B. Dendritic cells C....
Which of the following types of cells are antigen-presenting cells? A. Lymphocytes B. Dendritic cells C. Macrophages D. Red blood cells In the early 1930’s a procedure to detect cancer of the uterine cervix was first introduced by: A. George Papanicolaou B. James Papner C. Mary Papa D. Steven Mendel The goal of adjuvant treatment is to: A. Fluorescent mark cancer cells B. Kills nay cancer cells remaining after primary treatment. C. Relieve side of treatment or signs and syptoms...
The cartoon depicts intestinal epithelial cells joined to their neighbors by tight junctions, which allow the...
The cartoon depicts intestinal epithelial cells joined to their neighbors by tight junctions, which allow the cells to maintain biochemically distinct apical and basolateral regions. Which of the following accurately describes “the fence function” of tight junctions in intestinal epithelial cells? Group of answer choices (A) The fence function prevents Na+-driven glucose transporters from diffusing to the basolateral side and passive glucose transporters from diffusing to the apical side of the plasma membrane (B) The fence function prevents mixing of...
which is not an accurate description of the relationship among chordatas? a) all possess a "chord"...
which is not an accurate description of the relationship among chordatas? a) all possess a "chord" i.e. a backbone b) all vertebrates are chordatas but not all chordatas are vertebrates c) within the phylum that contains humans, there exist closely related invertebrate species d) an endoskeleton has allowed vertebrates to become much larger (and more successful) than non-vertebrates
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT