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:
Sunlight stimulates the growth of phytoplanktons which belong to the first trophic level in an aquatic ecosystem pyramid. If these do not exist, aquatic ecosystem would also disappear.
1: Oxygen Production, plants release oxygen.
2: Forest prevent a water runoff during rain.
3: They help prevent soil erosion.
4: Forests are also used in making medicine.
Answer: To
compensate for low concentrations of carbohydrates, the body hydrolyzes TAGs to
free fatty acids and glycerol, the latter of which is provided in ample supply
to feed the -citric acid cycle.
<span>When the body is
under starvation condition, low concentration of carbohydrates occurs, then the
body hydrolyzes triacylglycerols to fatty
acids and ketone bodies. Moreover, the acetyl CoA cannot be transformed into pyruvate so fatty
acids cannot be converted into glucose. The other potential source of glucose
is amino acids but this process is inherently inefficient and weakens
the body so protein must be preserve.</span>
