D. nephrons - the structural and funtional unit of kidney
Answer:
I would say all let me know if its wrong
Answer:
Your heart begins to pump harder and quicker to circulate blood to provide oxygen to your muscles. As a result, systolic blood weight rises. It's typical for systolic blood weight to rise to between 160 and 220 mm Hg amid exercise.
Explanation:
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Answer:
Gastroesophageal reflux disease (GERD) is caused by reflux of stomach acid into the esophagus when your lower esophageal sphincter (LES) is either weak or it relaxes when it shouldn't. Other potential causes can include obesity, smoking, diet, and pregnancy, among others.
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The best sources of fluoride are fluoridated water and beverages made with fluoridated water like tea, coffee, soup juices from concentrate e t c
Explanation:
Fluoride is a mineral that is used in dentistry to make teeth stronger. It is naturally found in sources like water soil, air, rocks e t c.
Fluoride helps fight against cavities in the teeth. It is recommended by dentists to use pastes, which have fluoride in them. In many countries, public water is supplied by adding fluoride to the water.
Fluorides are also used as cleaning agents. They are added to pesticides and also used in the manufacturing of steel , aluminium products e t c.
Excessive use of fluoride lead to side effects. So, they have to be added within permissible limits.
