Modern epidemiology involves history since finding the causes of chronic diseases requires looking back for <u>decades</u>.
In the past, infectious diseases, which were the leading cause of death, were the primary focus of epidemiological research. This was especially true after the advent of urbanization when populations began to concentrate in cities. Better hygiene, vaccination rates, and antibiotics were able to put an end to the epidemics.
Epidemiology gradually evolved into the study of the causes, the distribution, the risk factors, and the prevention of chronic diseases, but it also expanded to include the study of diseases with a mass occurrence at the population level, such as depression, and accidents. The medical community has slowly come around to the idea that diet plays a significant role in overall health, but they continue to give it less weight than it deserves.
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Answer:
a. True
Explanation:
Cardiac plexus is a network of nerves present at the base of the heart. Sympathetic fibers of cardiac plexus originate from the cardiac nerves and they arise from the sympathetic trunk. Parasympathetic fibers arise from the vagus nerve's cardiac branches. In this way the heart is innervated by both sympathetic and parasympathetic fibers. Medulla in brain controls both the branches.
Answer:
Explanation:
Cyanide is a potentially deadly poison. It restricts the oxygen supply to brain. The cyanide compounds that can be poisonous includes the hydrogen cyanide gas, potassium cyanide and crystalline solids. The following are the causes of cyanide poisoning:
1. Inhalation of smoke from fires.
2. Plants like cassava, apricot pits.
3. Cigarette smoking.
4. Prone to occupational tasks which involves the electroplating, metal processing, photography and synthesis of plastic products.
i believe the correct answer is B i’m sorry if i’m not correct
