Stage four of non-REM sleep is the deepest stage of sleep, according to Psych Central. Stage four is also called delta sleep because of the deep, slow delta waves of the brain during this part of the sleep cycle, which lasts about 30 minutes.
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.
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.
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.
The parts of a scientific lab report include the abstract, introduction, experimental methods and materials, results, discussion, conclusion and references, according to Purdue University. Evergreen Valley College adds a title page and applicable appendices. Each part of a lab report has specific data with a specific purpose so scientists and professionals can read each lab report clearly.
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.
To increase their platelet count, individuals need to treat the underlying cause of thrombocytopenia, according to WebMD. For example, if thrombocytopenia arises because of an infection, treating it can raise the platelet count.
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.
According to WebMD, the human body makes around 2 to 4 pints of saliva a day. A person also swallows that amount of saliva per day.
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.
According to Curiosity.com, the human body grows steadily from birth to late teens, at which point the skeletal system has fully formed. However, a few studies have found that both the pelvis and skull continue to grow after the teen years.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.