Approximately 80% of the energy used for active transport is devoted to the reabsorption of approximately 80% of the energy used for active transport is devoted to the reabsorption of glucose water potassium sodium

The correct answer for both blanks is "Sodium".
Sodium ions are necessary in small quantities for some sorts of flora, but sodium as a nutrient is extra usually wanted in large quantities by using animals, due to their use of it for era of nerve impulses and for upkeep of electrolyte balance and fluid stability. In animals, sodium ions are vital for the aforementioned capabilities and for coronary heart hobby and sure metabolic functions.

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