What best describes aerobic exercise?
Movement of large muscle groups which increase the body's use of oxygen
Lengthening of muscles using slow, controlled movements
Any activity not related to a person's occupation
A form of exercise in which our muscles work against resistance
The Correct Answer is A
A. Aerobic exercise involves continuous, rhythmic movements of large muscle groups, such as those in the legs and arms, that increase the body’s demand for oxygen. This type of exercise improves cardiovascular and respiratory efficiency, increases endurance, and helps with weight management. Examples include running, swimming, cycling, and brisk walking. During aerobic exercise, the heart rate and breathing rate increase to supply sufficient oxygen to working muscles.
B. Lengthening muscles using slow, controlled movements describes stretching exercises, which improve flexibility but do not primarily enhance cardiovascular endurance or oxygen utilization.
C. Physical activity not related to a person’s occupation is simply recreational or leisure activity. While some recreational activities can be aerobic, this description does not define aerobic exercise itself.
D. Exercise in which muscles work against resistance describes anaerobic or resistance training, such as weightlifting or strength training. While these activities build muscular strength and power, they do not primarily rely on oxygen for energy production.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Listeriosis is a bacterial infection caused by Listeria monocytogenes, typically from contaminated food, and is particularly dangerous during pregnancy. It is unrelated to cravings for nonfood items.
B. Famine refers to a widespread scarcity of food, often due to crop failure or disaster. It is not a medical condition involving cravings.
C. Preeclampsia is a pregnancy-related condition characterized by high blood pressure and protein in the urine, sometimes accompanied by swelling. It does not involve cravings for nonfood substances.
D. Pica is the medical term for a craving and consumption of nonfood substances such as dirt, clay, chalk, ice, or paper. It is often associated with nutritional deficiencies (e.g., iron or zinc deficiency), pregnancy, or certain mental health conditions. Pica can lead to health risks, including gastrointestinal blockages, poisoning, or infections if the nonfood items are contaminated.
Correct Answer is D
Explanation
A. While eating a variety of colorful fruits and vegetables can indicate a range of nutrients, color alone does not guarantee a healthful diet. A diet can be colorful but still high in added sugars, unhealthy fats, or processed foods.
B. Whether foods are organic or not does not determine the overall healthfulness of the diet. Both organic and conventionally grown foods can contribute to a balanced, nutritious diet. Excluding organic foods is not a key component of healthful eating.
C. Featuring whole foods—minimally processed foods like fruits, vegetables, whole grains, legumes, and lean proteins—is beneficial, but this alone does not fully define a healthful diet. Other factors, such as nutrient density and balance, are also critical.
D. Nutrient-dense foods provide a high amount of essential nutrients (vitamins, minerals, protein, fiber) relative to their calorie content. Choosing nutrient-dense foods helps ensure adequate nutrition while supporting healthy body weight and reducing the risk of chronic diseases. Examples include leafy greens, berries, lean proteins, whole grains, and legumes. Focusing on nutrient-dense foods is a cornerstone of a healthful diet.
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