Search found 778 matches

by biohazard
Mon Jun 11, 2012 8:47 am
Forum: Zoology Discussion
Topic: Cone snail
Replies: 4
Views: 10094

Re:

If you do an image search, you'll see that the narrow end of the shell is the anterior end of the snail. Umm, yeah. Did I say otherwise somewhere? :) Anyway, the animal has a barbed "tail" that is located in the wide/posterior end of the shell ("rear end", as I put it). The eyes...
by biohazard
Fri Jun 08, 2012 6:30 am
Forum: General Discussion
Topic: Blood Glucose Levels
Replies: 4
Views: 7316

Re: Blood Glucose Levels

I think the options identified speak to etiology rather than next test. Tho' there are insulin assays, wouldn't the likely next test be glucose tlerance test? In clinical practice, yes. But since the original question gives us just those four tests, I guess we have to assume that the aim is to demo...
by biohazard
Thu Jun 07, 2012 7:22 am
Forum: General Discussion
Topic: Blood Glucose Levels
Replies: 4
Views: 7316

The question depicts a classical case of the onset of type I diabetes mellitus. That means that due to the loss of insulin-producing pancreatic beta cells because of an autoimmune reaction the insulin levels are low in the blood. This impairs the intake of glucose to the cells and results in elevate...
by biohazard
Tue Jun 05, 2012 9:47 am
Forum: Zoology Discussion
Topic: Cone snail
Replies: 4
Views: 10094

Cone snail

https://www.dropbox.com/s/xb5af7hppfdmpdv/conesnail.jpg I found this critter (or hundreds of them to be exact) off the coast of Rhodes. I identified it as a cone snail, perhaps Conus ventricosus or similar. I've understood that all cone snails are predators and venomous. They have a barbed stinger ...
by biohazard
Mon May 21, 2012 8:57 am
Forum: Human Biology
Topic: Odd food poisoning-like symptoms, strange tastes
Replies: 34
Views: 197079

I have understood that at least in certain animals it can indeed happen so that the food begins to spoil in the gastrointestinal track, if the digestion becomes too slow. Perhaps this can also happen in humans, like mitchpmk wrote. It is even possible that several conditions can cause the same sympt...
by biohazard
Fri Apr 20, 2012 10:02 am
Forum: Microbiology
Topic: Question about viruses (particularly hiv)
Replies: 25
Views: 74979

All viruses can cause a "disease" in some way. They are parasites and thus by definition harmful to their hosts in some way. However, in order to cause a human disease the virus must be able to bind its target molecule on a human cell, enter the cell and produce copies of itself. Finally, ...
by biohazard
Fri Mar 09, 2012 7:35 am
Forum: Evolution
Topic: Where do we go from here?
Replies: 41
Views: 50892

Re: Where do we go from here?

As humans are finding ways to "cheat", i.e. the "weak ones" or those with "inferior genes" may still survive and pass on their genes. What you are referring to is not actually "cheating" but part of the evolution process. I believe the term is sexual selectio...
by biohazard
Fri Mar 09, 2012 7:18 am
Forum: Evolution
Topic: Evolution of itch
Replies: 3
Views: 5794

Re:

Darby wrote:The question every evolutionary explanation dreads: how would you test your hypothesis?


With knockout mice, obviously!! :D
by biohazard
Wed Mar 07, 2012 10:10 am
Forum: Evolution
Topic: Evolution of itch
Replies: 3
Views: 5794

Evolution of itch

Every once in a while I have been wondering what makes an itch so annoying you just have to scratch it (and often it goes away after you have simply clawed it for a second or two, quite unlike what happens with pain). Now I need you guys to help me to figure out the evolutionary reasons behind itchi...
by biohazard
Wed Feb 29, 2012 10:21 am
Forum: Human Biology
Topic: Odd food poisoning-like symptoms, strange tastes
Replies: 34
Views: 197079

Re: Odd food poisoning-like symptoms, strange tastes

I found out that Giardia lamblia infection can cause similar symptoms as described above by various people. Giardia is an intestinal protozoan parasite that can cause various gastro-intestinal problems, one of which is described as "a foul or sulphuric-tasting belch, which has been known to be ...
by biohazard
Tue Feb 28, 2012 7:24 am
Forum: Microbiology
Topic: HELP! Why do I keep getting a mixed culture in my gramstain?
Replies: 11
Views: 17755

Re: Re:

@biohazard: Thank you so much! Your advice was so much in detail and really appreciated. You were right it was my gram staining that caused the problem. I think it was just too much decolorization/alcohol step I added that was why there were some pink in my gram positives. But I redid it several ti...
by biohazard
Mon Feb 20, 2012 10:01 am
Forum: Evolution
Topic: The Evolution of Sex
Replies: 3
Views: 2789

Richard Dawkins' 'The Selfish Gene' has got some interesting information and examples of the evolution of sex.