Membranes â¢ Provide barrier function â Extracellular â Organelles â¢ Barrier can be overcome by âtransport proteinsâ â To mediate transmembrane movements of ions, Na + , K + â Nutrients, glucose, amino acids etc. â Water (aquaporins).
Boron is a chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in the Solar system and in the Earth's crust.
Boron11 , is an isotope for boron, in any case the atomic number showed the number of electrons and protons,subtrcating this number from the mass number you get the number of neutrons, in your question the atomic number for B is 5 = number of the electrons = number of protons. 11 - 5 = 6 the number of neutrons.