The mechanism of ion uptake that would best move sodium from the inside of the cell to the outside is ACTIVE TRANSPORT. It is a mechanism that requires energy.
Active transport is a mechanism used by cells to move substances and ions against a concentration gradient.
In active transport, substances are moved across biological membranes from a region of low concentration to a region of high concentration.
Active transport requires energy which is generally provided by the hydrolysis of ATP.
Snails and clams have hard shells while grasshoppers and dragonflies have none. Snails and clams have soft spines while grasshoppers and dragonflies have none.