Compléter 320-testVersion en ligne 320-test par Farhad Key 1 as signal result storage passes membrane other Chemistry is an extremely important topic in physiology . Most physiological processes occur as the of chemical changes that occur within the body . These changes include the influx / efflux of ions across a neuron's , causing a to pass from one end to the . Other examples include the of oxygen in the blood by a protein it through the lungs for usage throughout the body .