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Jan
26
awarded  Popular Question
Dec
17
comment Pathogenesis of type IV hypersensitivity
@Kendall So, the tissue injury is just the result of a prolonged activation of the immune mechanisms or of pathogen-mediated misdirection of the system? Thanks. Can you also shed light on the questions following "Moreover, a lot of books....."
Dec
17
comment Why does histamine release in Type I hypersensitivity help in case of parasites?
@Kendall So, what you say is, this kind of degranulation injury is there also in case of parasite-removal, but then the condition is not considered hypersensitivity, since the damage is only a collateral of a positive effect. In case of wrongful stimulation, it is called hypersensitivity, since the deleterious effect is unnecessary? According to AMR, the anti parasite effect is due to histamine acting on the parasite and not on the somatic cells. Also, can you add a reference. Thanks anyways.
Dec
12
awarded  Popular Question
Dec
1
comment Cellular concentractions, why do they remain constant?
Try to read this and then let me know if you need a further answer.
Nov
29
answered What stimulates a nociceptor?
Nov
29
comment Locomotion of Hydra: Why Somersaulting is better than Loop locomotion when moving to a larger distance?
Is not saving time a good enough argument?
Nov
29
answered At what point during an action potential are the sodium potassium pumps working?
Nov
29
revised If so many different hormones/molecules work by activating adenylyl cyclase, how do they have different effects?
added 67 characters in body; edited tags
Nov
27
revised Pathogenesis of type IV hypersensitivity
deleted 1 character in body
Nov
27
revised Why does histamine release in Type I hypersensitivity help in case of parasites?
deleted 7 characters in body
Nov
27
comment Why does histamine release in Type I hypersensitivity help in case of parasites?
@AMR Can you elaborate on "Find its target". Is not the effect of these mediators on vasculature and musculature the part of their anti-parasite effect?
Nov
27
asked Why does histamine release in Type I hypersensitivity help in case of parasites?
Nov
27
asked Pathogenesis of type IV hypersensitivity
Nov
9
awarded  Notable Question
Oct
13
comment Species-area relation graph
Perhaps because when analyzing large areas, adjacent masses of considerably different climatic conditions are successively bought under analysis, and will hence increase the richness faster than compared to small areas where increasing the analyzed area is still more likely to be confined to the same geo-climatic zone. Just speculations, though. Will get back with a better answer.
Oct
4
reviewed Approve Is there nutrient absorption in the large intestine of hindgut fermenters?
Oct
3
comment Bergmann's rule and Allen's rule: endotherms and ectotherms
I guess, it is because these rules refer to how animal bodies are evolved to minimize heat loss, which is relevant only for endotherms (who have a different internal homeostatic temperature) and not for ectotherms, whose body temperature is equilibriated with that of the environment, making heat saving mechanisms redundant.
Sep
22
awarded  Popular Question
Aug
20
awarded  Popular Question