Approximately 70-80 percent of cancers in the aging population are the result of

1 answer:

8 0

Cigarette smoking and environmental chemicals

Tobacco smoke and certain environmental chemicals are known carcinogens (substances that can cause cancer in living tissue). The tobacco smoke from cigarette smoking contains harmful chemicals such as hydrogen cyanide, arsenic, ammonia, benzene, and many more. In fact, from 2009 to 2013, three out of 10 cancer deaths in the U.S have been attributed to cigarette smoking or exposure to tobacco smoke.

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Some people have low levels of calcium circulating in the blood, a condition known as hypocalcemia. while for many this disorder

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Answer:

low level of calcium would result in fewer signals sent between pre and post synaptic cells.

Explanation:

The calcium has a main role in signal transmission mechanism and here is the mechanism :

1-the impulse reaches the synapse (depolarization which is a voltage change).

2-the voltage gated calcium channels open and let calcium flow into the cell.

3-the calcium causes the synaptic vesicles to rupture and release chemical transmitters which cross the synaptic cleft and finally bind to receptors on the post synaptic cell (transmitting the signal)

so it's obvious that if calcium concentration decreases, the signal transmission also decreases.

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Explanation:

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Enormous amounts of carbon are stored in fossil fuels when humans burning fossil fuels large amounts of carbon dioxide are relea

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Answer: Not have breathable air.

Explanation:

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NEED ANSWER FAST PLEASE!!!! Which professions require licenses to practice? only cosmetologists and dermatology technicians only

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