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Aliun [14]
2 years ago
6

How does a horn form?

Biology
1 answer:
Artist 52 [7]2 years ago
4 0
A horn results when glaciers erode three or more aretes, usually forming a sharp edged peak
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What is the primary mechanism associated with the role of fluoride in prevention of dental caries?​ a. ​Fluoride increases calci
MAXImum [283]

Answer:

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

Explanation:

Dental caries results when cariogenic (caries-causing) bacteria metabolize carbohydrates or sugars present in the mouth for their energy needs, producing organic acids as byproducts, thus lowering the pH of the plaque biofilm.

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.

However, when fluoride is present in saliva, fluorapatite, rather than hydroxyapatite, forms during the remineralization process as fluoride ions replace hydroxyl groups in the formation of the apatite crystal lattice.

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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2 years ago
What does letter C represent?
dmitriy555 [2]
The third letter in the alphabet
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What happens between alleles between the P generation and the F 2 generation
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When you cross a plant with a dominant Trait with a recessive version of the same trait, the recessive trait disappears in the F1 Generation and re-appears in the F2 Generation. 
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Appropriate term for the clinical manifestations of disease?
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carbon, hydrogen, and oxygen.

Explanation:

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