Preservatives are added to foods to help prevent or slow spoilage due to bacteria, molds, fungi or yeast, as well as to slow or prevent changes in the food's color, flavor or texture, delay rancidity, and maintain freshness.
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Answer:
Healthy vitamin D levels might help prevent skin from prematurely aging but too much sun leads to accelerated skin aging. Some studies have found that vitamin D can help treat skin conditions like dry skin, psoriasis, or eczema
Explanation:
Answer: Stereotype threat
<span>A stereotype threat is a social-psychological
predicament that can alters academic identity and intellectual performance. Negative
stereotypes raise inhibiting doubts and high-pressure anxieties in a
test-taker's mind that result to </span>reduce the performance of individuals.
The mind set of Courtney
that boys do better than girls in math and science would create anxiety, which
will then trigger a mechanism of decreases performance by depleting the working
memory of the brain.
Twisting or pulling a muscle or tendon can result in a strain. It can also be caused by a single instance of improper lifting or by over stressing the back muscles. A chronic strain usually results from overuse involving prolonged, repetitive movement of the muscles and tendons. In addition, there are several factors that put a person at greater risk for a back strain or sprain, including excessively curving the lower back, being overweight, having weak back or abdominal muscles, and tight hamstrings (muscles in the back of the thighs). Playing sports that involve pushing and pulling—such as weightlifting and football—also increases the risk of a low-back injury. Chronic strains happen slowly over time from prolonged, repetitive overuse of muscles. Chronic strains develop from using the same muscle groups in the same pattern, causing even small stresses to build on one another. Causes of chronic strain include:
Improper body mechanics or using the wrong muscle groups for a task, such as repeatedly lifting heavy objects using your back instead of your legs
Improper sports mechanics or techniques, such as habitually gripping a tennis racket too tightly or an incorrect golf swing
Participation in the same exercises in the same way, day after day
Poor posture
Use of the wrong equipment, such as running shoes without the proper support for your foot type
