The UV is needed by the skin to make previtamin D3. Previtamin D3 or cholecalciferol made from the skin will be changed in the liver into 25- hydroxyvitamin D3 and then sent to the kidney to be changed into 1,25- dihydroxyvitamin D3. The last change in the kidney will active the vitamin D. Vitamin D has a role in the calcium absorption which was will strengthen the bone tissue.
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synonyms: endothermal, endothermic endoergic, energy-absorbing. (of a nuclear reaction) occurring with absorption of energy. decalescent. absorbing heat without increase in temperature when heated beyond a certain point. Antonyms: exothermal, exothermic, heat-releasing.
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<h3>hope it helps you from my side </h3>
A cell wall is a structural layer that surrounds some types of cells, situated outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides cells with both structural support and protection, and also acts as a filtering mechanism. Cell walls are present in plants, fungi and prokaryotic cells, where a major function is to act as pressure vessels, preventing over-expansion when water enters the cells. Cell walls are absent from mycoplasmas.
1) The main difference between a prokaryotic cell and a eukaryotic cell isD) the presence of a true nucleus.
2) Which type of cell contains DNA enclosed in a nucleus?
C) plasmid
3) Viruses CANNOT
B) live in bacteria.
Hope this helps.
Answer:
im not sure what you mean but whatever it is good luck!
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