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astraxan [27]
3 years ago
6

1. Different organs are connected by tubes or vessels to create_____.

Biology
2 answers:
Yuri [45]3 years ago
7 0

The answer is organ systems, Hope it helps!

riadik2000 [5.3K]3 years ago
4 0
Organ systems i think
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-. Describe how ATP can release and store energy<br> for the cell.
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Answer:

ATP consists of an adenosine molecule

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In a process called cellular respiration, chemical energy in food is converted into chemical energy that the cell can use, and stores it in molecules of ATP.

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Answer:

d. ​Fluoride becomes incorporated into the crystalline structure of teeth, making them less susceptible to decay

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The hydroxyapatite of tooth enamel is composed mainly of phosphate ions (PO₄³⁻) and calcium ions (Ca⁺). Under normal conditions, there is a stable equilibrium between the calcium and phosphate ions in saliva and the crystalline hydroxyapatite. At low pH (acidic conditions), there is a shift in equilibrium resulting in the dissolution of hydroxyapatite from tooth enamel, a process known as demineralization. A reverse process called remineralization (the process of incorporation of minerals in tooth enamel) occurs when the saliva, acting as a buffer elevates pH. When equilibrium is shifted to favor continued demineralization, dental caries results.

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Fluorapatite is less soluble than hydroxyapatite making it more resistant to demineralization, even under conditions of low pH. Thus, fluoride acts as an effective anticaries agent.

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