Medical Ranges & Levels

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The characteristics of a healthy person include a high level of high-density lipoprotein cholesterol, a low resting heart rate, balanced muscular strength, a high level of cardiovascular fitness and being happy in work and home life. Together, these factors lower the risk of heart attack, cancer, injury, mental illness and other diseases that are more likely to manifest themselves in less healthy individuals.

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  • When do men stop growing taller?

    Q: When do men stop growing taller?

    A: Most men stop growing taller at about age 16, according to KidsHealth.org. Even if they do not grow taller after that age, their muscles usually continue to develop.
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  • What percent of your life do you spend sleeping?

    Q: What percent of your life do you spend sleeping?

    A: On average, human beings spend 33 percent of their lives sleeping, according to Sleep Disorders and Sleep Deprivation. This amounts to about eight hours per day. While not everything is known about sleep, it is a critical physiological need of human beings and other animals.
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  • How do you read a blood test?

    Q: How do you read a blood test?

    A: The National Heart, Lung, and Blood Institute shows normal ranges for the most common values detected on a blood test, including red blood cell count, white blood cells, platelets, hemoglobin, hematocrit and mean corpuscular volume. The NHLBI also gives normal ranges for blood glucose levels and lipoproteins such as cholesterol. Abnormal results can indicate disease as well as issues with diet, menstrual cycle, physical activity levels, alcohol intake and medicines.
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  • How do hormones affect behavior?

    Q: How do hormones affect behavior?

    A: According to Sciences 360, hormones affect many facets of human behavior, including emotions, health, sexual attraction and even weight. Sciences 360 defines hormones as chemicals created by a cell or organ that communicate to another cell or organ to help to regulate normal body functions such as sleeping and eating.
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  • What is an acceptable recovery heart rate level 10 minutes after exercising?

    Q: What is an acceptable recovery heart rate level 10 minutes after exercising?

    A: Within 10 minutes after exercise, the heart should be at its normal, resting rate. According to WebMD, the heart slows down by 12 beats per minute or more each minute, which translates into a drop of at least 120 beats per minute in the first 10 minutes after exercise.
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  • How long can a person go without breathing?

    Q: How long can a person go without breathing?

    A: According to TransWeb, people typically develop serious and possibly irreversible brain damage after 5 to 10 minutes of not breathing. Brain cells begin to die after 1 minute without oxygen. Serious brain damage is likely within 3 minutes without breathing.
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  • When is your body temperature too high?

    Q: When is your body temperature too high?

    A: Any body temperature above 102.5 degrees Fahrenheit is considered a high fever, says MedicaLook. Fevers that reach 107 F or higher are exceptionally dangerous, because the majority of humans cannot survive such high internal temperatures. The Mayo Clinic advises that adults should seek immediate medical attention for fevers of 103 F or higher.
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  • When does a fever become dangerous?

    Q: When does a fever become dangerous?

    A: According to Mayo Clinic, the point at which a fever becomes dangerous depends upon age and other accompanying symptoms. It is generally advised to seek treatment if the fever rises above 102 degrees Fahrenheit in adults and children over 3 months old.
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  • What is high blood sugar?

    Q: What is high blood sugar?

    A: High blood sugar, or hyperglycemia, is identified by blood glucose levels that are greater than 200 milligrams per deciliter, according to Mayo Clinic. Common signs of high blood sugar include increased urination, blurred vision, increased thirst, fatigue and headache. In extreme cases, high blood sugar can cause coma and death.
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  • Why is respiration important?

    Q: Why is respiration important?

    A: Respiration is important because it produces energy that is essential for the normal functioning of the body. Respiration provides cells with oxygen and expels toxic carbon dioxide. The BBC notes that cells need energy for movement, multiplication, the synthesis of essential molecules and maintaining body temperature.
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  • What is the first symptom of a blood clot in the calf?

    Q: What is the first symptom of a blood clot in the calf?

    A: According to WebMD, the first symptom of a blood clot inside the calf, also known as a deep vein thrombosis, varies from person to person. Common symptoms include calf pain, weakness, swelling or the appearance of bulging surface veins. Deep vein thrombosis can also be present without any symptoms. This is dangerous, because the blood clot can break free and travel to block more critical blood vessels.
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  • What are normal progesterone levels?

    Q: What are normal progesterone levels?

    A: In women, normal progesterone levels from the first to the 14th day of the menstrual cycle are less than 1 nanogram per milliliter, according to WebMD. From the 15 until the 28th day of the menstrual cycle, normal progesterone levels are around 2 to 25 nanograms per milliliter. In men, normal values are less than 1 nanogram per milliliter.
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  • What is the average human reaction time?

    Q: What is the average human reaction time?

    A: For college-age individuals, reaction times to light stimuli have been published as 190 milliseconds, or 0.19 seconds, and to auditory stimuli as 160 milliseconds, or 0.16 seconds. Human reaction times vary according to the type of stimuli, the method of measurement and the particular study's results.
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  • What happens if you do not get enough vitamin D?

    Q: What happens if you do not get enough vitamin D?

    A: According to WebMD, vitamin D deficiency is traditionally known to cause rickets, but a myriad of other health conditions have also been associated with low levels of vitamin D in the blood, including bone and muscle pain and weakness, cardiovascular disease, asthma and cancer. Vitamin D, commonly referred to as the sunshine vitamin, helps the body use calcium and is essential for strong bones and immunity.
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  • What are normal thyroid levels?

    Q: What are normal thyroid levels?

    A: The normal range of the thyroid hormone triiodothyronine goes from 100 to 200 nanograms per deciliter of blood, and the normal range for thyroxine is from 4.5 to 11.2 micrograms per deciliter, according to MedlinePlus. Abnormal amounts of these hormones may indicate an overactive or underactive thyroid.
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  • What is a normal heart rate?

    Q: What is a normal heart rate?

    A: Normal resting heart rate for adults is between 60 and 100 beats per minute, according to the Mayo Clinic. Resting heart rate varies considerably by age, but after 16, teenagers have the same normal range as adults.
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  • When should I see a doctor about high blood pressure?

    Q: When should I see a doctor about high blood pressure?

    A: One should see the doctor if her blood pressure measures above 140/90 over the course of two measurements, states WebMD. It is also important to schedule an appointment if one begins experiencing side effects from blood pressure medicine or if normally controlled blood pressure goes above normal range.
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  • What is uraemia?

    Q: What is uraemia?

    A: According to Dictionary.com, uraemia, or uremia, is when the waste products that are normally expelled through the urine, such as urea, are backing up into the blood. It is from the Greek words "ouron," meaning urine, and "haima," meaning blood.
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  • What is a normal blood sugar level for a 2-year-old child?

    Q: What is a normal blood sugar level for a 2-year-old child?

    A: According to Mayo Clinic, typical blood sugar levels in a toddler fall between 100 and 200 mg/dL, with an average of around 70 to 90 mg/dL. A blood sugar level outside of these amounts could be an indicator of diabetes.
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  • What does a low body temperature indicate?

    Q: What does a low body temperature indicate?

    A: A low body temperature indicates either exposure to cold weather or a decrease in the body's metabolic rate. It can also indicate both. Left unchecked, it may progress to hypothermia, a potentially life-threatening condition. According to Dictionary.com, hypothermia is an abnormal decrease in body temperature.
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  • How can a diabetic keep his blood sugar levels within a normal range?

    Q: How can a diabetic keep his blood sugar levels within a normal range?

    A: A diabetic keeps his blood sugar levels within a normal range by using the medication his doctor prescribes, consuming a healthy diet and participating in regular activity, according to Mayo Clinic. Even with careful control, blood sugars change quickly, making regular monitoring essential.
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