Answer:
Catecholamine made by the action of tyrosine hydroxylase and aromatic amino acid decarboxylase is DOPAMINE
Explanation:
Catecholamines are formed from the amino acid - tyrosine. Food which are rich in protein are sources of Tyrosine. Also, the body system can produce tyrosine by adding hydroxyl group -OH to phenylalanine. Cells that secret catechomines such as dopamine use several reactions (catalyzed by tyrosine hydroxylase and amino acid decarboxylase) to convert tyrosine in series to L-DOPA and then to dopamine. L-DOPA is L-3,4-dihydroxyphenylalanine. The enzyme - tyrosine hydroxylase changed tyrosine to L-DOPA. While L-DOPA is changed into dopamine by the enzyme - amino acid decarboxylase.
The factors listed below contributed to the development of trade in the Roman Empire:
- Peace throughout the empire. This fostered the development of trade within the very vast territories of the Empire. The army, which was the largest public expenditure for the state, guaranteed protection for traders. Also a free trade region had been created inside the Empire borders.
- A shared religion throughout the empire. This entails a common cultural background, which enhanced the trustworthiness of other trades and made easier to reach agreements.
- A network of good roads. Romans are admired, even nowadays, for the amazing road system they built all over their territories. But still, technologies to build profitable means of land transport were not available at those times, and sea or river transport was still the quickest and cheapest. Specially sea transport suffered the big threaten generated by piracy. It was not always possible to confront them sucessfully.
- A common currency throughout the empire. Of course is an important factor which increase the ease of reaching trade agreements. The Roman currency consisted on gold, silver, bronze, orichalcum and copper coinage. It was introduced during the Republic times, during the third century BC, and lasted until the Empire and later.
Answer:
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Answer:
Explanation:
Louisiana has more than 1,000 crawfish farmers, plus more than 800 commercial fishermen who catch wild crawfish. The 110 million pounds of crawfish harvested each year have an annual economic impact of $120 million.
Answer:
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Explanation:
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