Related by context. Frequent words. (Click for all words.) 72 calcium ions 69 sodium ions 66 cell membrane 64 hydrogen ions 62 cell membranes 61 cytosol 60 tubules 60 capillaries 60 tiny pores 60 vesicle 59 ions 59 plasma membrane 58 lymphatic vessels 58 lithium ions 58 outer membrane 57 lysosomes 57 sensory nerves 57 anion 56 membrane 56 ion channels 56 electrons 56 Nitric oxide 56 endocytosis 56 bile acids 55 molecules 55 endoplasmic reticulum 55 vasodilation 55 anions 55 digestive juices 55 chemical messengers 55 metal ions 55 pulmonary arteries 55 capillary 54 proinflammatory 54 extracellular 54 vasoconstriction 54 transduction 54 crystal lattice 54 molecule 54 oxygen atoms 54 tumor vasculature 54 intracellular calcium 54 ionized gas 54 pores 54 reversibly 53 alveoli 53 analyte 53 bloodstream 53 oxygen atom 53 excitons 53 inactivates 53 lysosome 53 secretory 53 vasculature 53 ceramide 53 microtubules 53 efflux 53 blood vessels 53 stomata 53 opioid receptors 53 biomolecule 53 tumor microenvironment 53 catecholamines 53 membrane protein 53 microchannels 53 neurotransmitter 52 intracellular 52 carbonic acid 52 bronchi 52 micelles 52 dopants 52 myoglobin 52 dye molecules 52 Wnt signaling 52 microbubbles 52 organelle 52 heme 52 Aβ 52 upregulation 52 atherosclerotic plaques 51 β 51 redox 51 phonons 51 biochemical pathway 51 cysteine 51 electron 51 mutant protein 51 noradrenaline 51 TRPV1 51 dimer 51 membranes 51 collagen fibers 51 excitatory 51 cofactor 51 reactants 51 integrins 51 nanopore 51 receptor protein 51 cytoplasmic 51 synapse 51 adsorb