There more questions:
1. In erytrhopoiesis, which of the following increases from the proerythroblast to the mature erythrocyte?
a. Cell size
b. Phagocytic ability
c. Cytoplasmic acidophilia
d. Cytoplasmis basophilia
4. Which of the following statements describes an example of innate immunity?
a. An allergic reaction to insect venom
b. The classical pathway of complement
c. The destruction of virus-infected cells by T-killer cells
d. The production of Ig G in response to insect venom
e. The alternative pathway of complement
This is a nagging quest,I was thinking that the answer for this is--- (a)
as,. Innate immunity refers to antigen-nonspecific defense mechanisms that a host uses immediately or within several hours after exposure to almost any antigen (def). This is the immunity one is born with and is the initial response by the body to eliminate microbes and prevent infectionThe innate immune responses involve:
phagocytic cells (neutrophils, monocytes, and macrophages);
cells that release inflammatory mediators (basophils, mast cells, and eosinophils);
natural killer cells (NK cells); and
molecules such as complement proteins, acute phase proteins, and cytokines.
Examples of innate immunity include anatomical barriers, mechanical removal, bacterial antagonism, pattern-recognition receptors, antigen-nonspecific defense chemicals, the complement pathways, phagocytosis, inflammation, fever, and the acute-phase response.
and as for the The Alternative Complement Pathway
The alternative complement pathway is mediated by C3b, produced either by the classical or lectin pathways or from C3 hydrolysis by water. (Water can hydrolize C3 and form C3i, a molecule that functions in a manner similar to C3b.)
Activation of the alternative complement pathway begins when C3b (or C3i) binds to the cell wall and other surface components of microbes. C3b can also bind to IgG antibodies.
so what do u all say the answer could be -- a or e
