Answer:
The blood pressure is directly proportional to the total length of the vessel.
Explanation:
The blood pressure is directly proportional to the total length of the vessel.
The long blood vessel will have higher the resistance and the flow of blood will be lower.
Thus, making intuitive sense, as with blood volume, as the vessel's enhanced surface area will impede blood flow. This lowering area will lead to the higher blood pressure through the blood vessel. Similarly with the reduction in the resistance of the blood vessel, the blood flow will boost.
The most important consideration when issuing a clinical practice recommendation for a preventive service across a large population is that the preventive services causes no harm.
<h3>What are preventive services?</h3>
Screenings, check-ups, and patient counselling are all part of routine health care is referred to as preventive services.
Preventive care can significantly increase your lifespan because it allows you to detect problems early and treat them more effectively.
For example, if one practices weight management and lose excess weight/keep it off, you will live longer and avoid serious diseases such as type 2 diabetes and heart disease.
Thus, the most important consideration when issuing a clinical practice recommendation for a preventive service across a large population is that the preventive services causes no harm.
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It is widely recognised that a CMR equal to or greater than one death per 10,000 persons a day signifies an emergency situation requiring an immediate response.
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Answer:
Conversion of alcohols to alkenes: R-CH2-CHOH-R → R-CH=CH-R + H2O
Conversion of carboxylic acids to acid anhydrides 2 RCO2H → (RCO)2O + H2O
Explanation:
Dehydration
In chemistry, a dehydration reaction is one that involves the loss of water. In organic synthesis, where an acid is often used as a catalyst, there are numerous examples of dehydration reactions: Conversion of alcohols to ethers: 2 R-OH → R-O-R + H2O Conversion of alcohols to alkenes: R-CH2-CHOH-R → R-CH=CH-R + H2O Conversion of carboxylic acids to acid anhydrides 2 RCO2H → (RCO)2O + H2O Conversion of amides to nitriles: RCONH2 → R-CN + H2O
Sources:
Klein Organic Chemistry. 2th edition
Mcmurry's Organic Chemistry. 9th edition.