I'm interested in cells. As many different types as can be identified, and the more specific the better. Preferably mammalian, certainly vertebrate (otherwise the the list would be too big!). [more inside]
posted by kisch mokusch on Mar 8, 2007 - 16 answers

Is there a species (mammal, reptile, amphibian, etc.) that has two functioning sexual organs? [more inside]
posted by goalyeehah on Dec 24, 2006 - 19 answers

Biopsychology extra credit question and I have no idea... "Why do you suppose activation of the first synapse of the parasympathetic nervous system produces excitatory post synaptic effects, but activation at some target organs produce inhibitory post synaptic effects (i.e. slowing down organ activity)?"
posted by j-urb on Jan 29, 2006 - 10 answers