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See why our users from 154 countries love us for their exam prep! Including 200 reviews for the DHA Nutritionist exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

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DHA Nutritionist - Test Reviews Sample Questions

In adult men, body fat should be what percentage of total body weight?

Correct Answer:
14 – 28%


in adult men, the recommended percentage of body fat relative to total body weight typically ranges from 14% to 28%. this range is considered healthy and normal, reflecting an adequate amount of body fat that supports metabolic function and hormone production, while also providing energy reserves and protecting internal organs.

body fat percentage is an important indicator of health. too low a percentage can lead to issues such as decreased muscle strength, compromised immune function, and potential hormonal imbalances. on the other hand, too high a percentage increases the risk of metabolic syndromes, including diabetes, heart disease, and other health complications.

the 14% to 28% range for men is contrasted slightly with the range recommended for women, which is slightly higher at 15% to 29%. this difference is largely due to physiological variations between genders, including hormonal composition and reproductive system requirements. women naturally require a higher body fat percentage to maintain healthy reproductive systems and menstrual cycles.

it's essential to understand that individual needs can vary based on factors like age, genetics, activity level, and overall health. therefore, while these ranges serve as general guidelines, personal circumstances and medical advice should also be considered when evaluating one's optimal body fat percentage.

When stomach acids come up to the esophagus when the cardiac sphincter does not close tightly this is known as which of the following?

Correct Answer:
reflux esophagitis


the correct answer to the question is "reflux esophagitis." this condition occurs when the lower esophageal sphincter, also known as the cardiac sphincter, fails to close properly. the primary function of this sphincter is to act as a valve that lets food into the stomach but prevents gastric acids from flowing back into the esophagus. when this sphincter does not close tightly, stomach acids and contents can back up into the esophagus, leading to a condition known as gastroesophageal reflux disease (gerd).

reflux esophagitis is characterized by inflammation and irritation of the esophagus due to this acidic backwash. common symptoms include heartburn, chest pain, and difficulty swallowing. chronic exposure to stomach acids can damage the lining of the esophagus, causing further complications such as ulcers, strictures, and potentially even leading to barrett's esophagus, a condition where the tissue lining the esophagus changes to tissue that resembles the lining of the intestine.

it is important to differentiate reflux esophagitis from other conditions listed in the question. dysphagia, for instance, refers generally to difficulty in swallowing, which can be a symptom of reflux esophagitis but is not a diagnosis itself. achalasia is another condition affecting the esophagus, where the muscles of the esophageal wall and the lower esophageal sphincter fail to relax properly, inhibiting the passage of food into the stomach, but it does not involve the reflux of stomach acids. a hiatal hernia occurs when part of the stomach protrudes through the diaphragm into the chest cavity, which can contribute to gerd but is a distinct anatomical issue.

in summary, reflux esophagitis is specifically the inflammation of the esophagus caused by the backflow of stomach acids due to a malfunctioning lower esophageal sphincter. managing this condition often involves lifestyle changes such as diet modifications, elevating the head during sleep, and medical treatment with antacids or acid blockers to reduce the production of stomach acids and protect the esophageal lining.