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A diagram of the plasma membrane of a cell. The phospholipid bilayer separates the cytoplasm (below) from the extracellular fluid (above). This image is created by Wikimedia Commons user LadyofHats Mariana Ruiz, who released it into the public domain.
Inside the cell, in the cytoplasm, which is below the membrane in this diagram, we see there's a lot of potassium ions, and not a lot of sodium ions. So the potassium concentration gradient drives potassium ions to leave the cell when they are able. In contrast, outside the cell, there are a lot of sodium ions, and not a lot of potassium ions.
This image shows a coronal section of whole, normal brain, through the frontal lobes. The cerebral cortex is labeled in green. The genu of the corpus callosum is outlined in red. The white matter is, well, white.
Re: Question Bank 09/27/18 @ 16:26 by jdmiles: Aloha. I'm afraid ther isn't currently a way to print out multiple questions.
Diagram of the lumbar plexus. <-- Previous Image . Categories (tags) users associate with this resource. ...
Re: Question Bank 09/27/18 @ 16:26 by jdmiles: Aloha. I'm afraid ther isn't currently a way to print out multiple questions.
This image shows the medial surface of the left cerebral hemisphere from a person who has suffered an infarct in the left Posterior Cerebral Artery (PCA) distribution. From the accumulation of bilirubin in the infarcted tissue, the infarct appears dark on the unlabeled image, and in the labeled image is circled in red.
Recent middle cerebral artery infarct, whole mount coronal section through frontal lobe, labeled Last updated on Wednesday, April 15 2009 by jdmiles This is a coronal slice of gross brain, through the left cerebral hemisphere.
Vanishing white matter disease, H&E stain, 200 X magnification, labeled Last updated on Sunday, April 5 2009 by jdmiles Axonal spheroids are a non-specific marker of axonal damage, caused by swelling in the axon as material transported along the axon accumulates.
Vanishing White matter disease, H&E stain, high power, Labeled. Last updated on Sunday, April 5 2009 by jdmiles