Transfer of amino acids and urea to and from the subarachnoid space.
D000596:Amino Acids / Q000378:metabolism*; D000613:Aminobutyrates / Q000378:metabolism; D000818:Animals; D001693:Biological Transport, Active; D002247:Carbon Isotopes; D002415:Cats; D002555:Cerebrospinal Fluid; D006207:Half-Life; D007700:Kinetics; D007930:Leucine / Q000378:metabolism; D010841:Pia Mater / Q000378:metabolism*; D013346:Subarachnoid Space; D014508:Urea / Q000378:metabolism*
D000596:Amino Acids; D000613:Aminobutyrates; D002247:Carbon Isotopes; D014508:Urea; D007930:Leucine