What is the purpose of the hormone thyroxine, which is produced by the thyroid gland?

The principal function of thyroxine is to stimulate the consumption of  oxygen and thus the metabolism of all cells and tissues.

Thyroxine is termed T4. It travels through the blood to the target cells and becomes converted to triiodothyronine  or T3.

T3 is the active form of thyroxine. T3 enters the target cell's nucleus binding to genes responsible  or involved  in the metabolism of sugar in the body. T3 stimulates these genes and in so doing metabolism (conversion of oxygen and calories to energy) is carried out by the cell, which also results in generation of body heat.

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )