Medical Ranges & Levels

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According to WebMD, a normal blood pressure is lower than 120/80. This means that the systolic number is 120 or lower, and the diastolic number is 80 or lower. The systolic number measures artery pressure when the heart contracts. The diastolic number measures artery pressure between heartbeats.

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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 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 Is the Definition of "legally Deaf"?

    Q: What Is the Definition of "legally Deaf"?

    A: The medical definition of legal deafness is 66 to 85 decibels of hearing loss. On the scale of hearing loss degrees, this is considered severe. Anything over 85 decibels of hearing loss is considered profound. According to the U.S. Centers for Disease Control and Prevention, only those whose hearing impairment impedes their ability to comprehend speech and language are considered to have some level of deafness.
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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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  • 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 Many Decibels Can the Human Ear Take?

    Q: How Many Decibels Can the Human Ear Take?

    A: If a sound level of 85 decibels is endured for eight hours, permanent damage can result. At 100 decibels, permanent damage can result after as little as 15 minutes. Above 120 decibels, the damage can be both permanent and immediate.
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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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  • 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 Are Acceptable Radon Levels?

    Q: What Are Acceptable Radon Levels?

    A: According to the Environmental Protection Agency, radon levels above 4 pCi/L (picocuries per liter) are dangerous. People who live in homes where the average radon level is more than 4 pCi/L should alter their home to reduce the radon level.
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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 the Normal Pulse Rate of an Adult?

    Q: What Is the Normal Pulse Rate of an Adult?

    A: The normal pulse rate of an adult ranges from 60 to 100 beats per minute, according to Medical News Today. This rate temporarily increases or decreases depending on a variety of factors, including physical activity, body temperature and emotional state.
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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 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 Should Your Blood Pressure Be?

    Q: What Should Your Blood Pressure Be?

    A: According to WebMD, a normal blood pressure is lower than 120/80. This means that the systolic number is 120 or lower, and the diastolic number is 80 or lower. The systolic number measures artery pressure when the heart contracts. The diastolic number measures artery pressure between heartbeats.
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  • What Is the Highest Fever Ever Recorded?

    Q: What Is the Highest Fever Ever Recorded?

    A: The highest fever ever recorded was 115.7 degrees Fahrenheit. This fever was reported in the Lawrence Journal-World, in July of 1980. A 51-year-old man named Willie Jones suffered heat stroke on July 10, 1980, when the temperature outside was 90 degrees Fahrenheit. He received treatment and survived the fever.
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  • How Much Does Your Skin Weigh?

    Q: How Much Does Your Skin Weigh?

    A: According to the Cleveland Clinic, the skin of an average adult weighs about 6 pounds. Skin covers about 22 square feet of space and renews itself about every 27 days. It is the body's largest organ and plays a critical role in protecting the body from infections and the elements.
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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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  • 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 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 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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  • What Are Characteristics of a Healthy Person?

    Q: What Are Characteristics of a Healthy Person?

    A: 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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