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Cynthia McKelvey
Oberlin Ohio

Interesting things from an overly-curious science nerd.

My posts are presented as opinion and commentary and do not represent the views of LabSpaces Productions, LLC, my employer, or my educational institution.

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Recent Comments
Comment by Cynthia McKelvey in MDMA and "Drugs Live: The Ecstasy Trials"

Thanks! It's good to be back (again haha). It's definitely hard finding the time to write if you're fully employed elsewhere! I'd love to hear from Donna, but I'm not longer at UF so maybe you coul. . .Read More
Apr 30, 2013, 1:10pm
Comment by Brian Krueger, PhD in MDMA and "Drugs Live: The Ecstasy Trials"

Great to see you again!  I know I've had a hard time finding the time to continue writing with everything going on.  You know, one of the scicomm people that ran the internet outreach at UF gradu. . .Read More
Apr 29, 2013, 3:34pm
Comment by Cynthia McKelvey in Salty Penguins Filter Salt Out Their Nose

Hi Dan, Sorry it took me so long to reply to your comment. I actually didn't even see it for quite some time. I did do some research though, and it turns out that the fluid within the cavit. . .Read More
Apr 09, 2012, 12:46pm

This is fascinating! But where does the non-salty fluid come from (or START from)? It can't be the blood stream... . . .Read More
Mar 16, 2012, 2:55pm

Thanks! Haha yeah I was wondering if that first sentence could have been worded more clearly. Although I think I look better on my camera phone than I do IRL, but maybe that's because of the poor r. . .Read More
Mar 03, 2012, 7:15pm
Views: 3750 | Comments: 2
Last by Cynthia McKelvey on Apr 09, 2012, 12:46pm
The Venture Brothers season 1, episode 5, via [adult swim]
Why yes, penguins do have an organ that converts sea water into fresh water! Except it's not an organ, it's a gland. And it doesn't directly convert sea water to fresh water, it filters salt from the blood.
Hm, maybe I should start from the beginning.
First of all, this organ/gland/whatever that Dean is talking about is called the supraorbital gland, and it's something all marine birds have. Basically any mammal or bird that is going to have to drink sea water to quench thirst is going to need this gland.
Normally, salt that we ingest is absorbed into the blood stream, filtered out by the kidneys, and secreted in urine. However, the penguin's small kidneys can only filter out enough salt to create urine that's about 1/3 the concentration of sea water. If the blood is still too salty, then water must be taken from other tissues to dilute it, and this quickly leads to dehydration.
. . . More
Views: 1973 | Comments: 2
Last by Cynthia McKelvey on Dec 19, 2011, 9:50am
Yes, really. On the left is the skull of a woodpecker, where the hyoid can be seen extending up from behind the skull. On the right labeled (b) is the woodpecker hyoid bone by itself. . . . More
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