beastfromthemiddle-east asked: Hi, I'm in an Anatomy class and I'm having some trouble with Nervous Traces. For example: 1) trace a stimulus from the upper limb initiates a skeletal muscle response in the ipsilateral upper limb. Do you know who I would go about this?
Hmm, a mnemonic device might help greatly! For my anatomy classes, I literally just repeated them over and over again and tried to make a mnemonic device in my head, I also tried to bombard myself with videos, different anatomy books and slides of certain structures. I’ll publish this and hopefully MY FOLLOWERS WILL HELP! Sorry I’m not much help :(
Blue Parrotfish (Scarus coeruleus)
“Blue Parrotfish is a member of the parrotfish genus Scarus. It is found on coral reefs in shallow water in the tropical and subtropical parts of the western Atlantic Ocean and the Caribbean Sea. They use their parrot-like beaks, which are actually fused teeth, to scrape algae from coral and other rocky substrates. Around 80% of the Blue Parrotfish’s time is spent searching for food.”
Further Details: http://is.gd/vkW88s
Image Via: http://is.gd/6nzyKV
Three images illustrating the limitation of traditional light microscopy and the power of a super-resolution technique called Photoactivation Localization Microscopy.
- When a microscope lens collects light from a molecule and reimages it onto a camera, the light forms a “blurry” spot that reflects the size of the light’s wavelength instead of the molecule’s size.
- This is called “diffraction,” and it restricts the resolution of light microscopy to ~1/2 the light’s wavelength (~250 nm) or approximately the size of a small mitochondrion.
- Thus, imaging with traditional light microscopy is like painting with a “blurry” brush. Individual molecules closer in space than ~250 nm will appear as one.
 Here a U2OS [human osteosarcoma] cell is labeled with fluorescent proteins and imaged with traditional microscopy using TIRF (total internal reflection) microscopy, with a resolution of ~250 nanometers.
 The same cell is now imaged with Photoactivation Localization Microscopy, shrinking the resolution from ~250 nm to 20 nm. Individual molecules of the membrane protein farnesyl labeled with a photoactivable fluorescent protein are distinguishable.
 The same cell is rendered using a high-speed version of the super-resolution technique. This allows real-time imaging in live cells. 3D images can be created by finding the axial position of each molecule with methods such as interferometry.
SOURCE: Zeiss Cell Picture Show
400 Million Year-old Trilobite
Well-preserved trilobite specimen from Morocco that lived during the Devonian Period roughly 400 million years ago.
Trilobites are a well-known fossil group of extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (521 million years ago), and they flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders except Proetida died out.
Image Credit: Chip Clark/Smithsonian
text and photo from Hashem AL-ghaili
Did you know that in many parts of the United States, cougars are making a comeback? Listen to this National Geographic radio interview with Panthera’s Teton Cougar Project Leader, Dr. Mark Elbroch, to learn about this comeback, our work in NW Wyoming to understand why cougars are NOT on the rise in this region, what to do if you encounter a cougar in the wild, competition between cougars & wolves, & more @ http://bit.ly/1gYLlM7.
Get info on Panthera’s Teton Cougar Project @ http://bit.ly/1lKMjNB.
Fiery Throated Hummingbird