|
|
ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.
Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.
Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
![South Vietnamese women and children were among some 300 apparently unarmed civilians killed in a ...](https://biology-forums.com/gallery/47/medium_617724_05_12_16_5_58_24_242152164.jpeg)
![Men and women work the same number of hours a week, but men spend more time on paid work, and women ...](https://biology-forums.com/gallery/27/medium_660366_07_04_17_11_20_46_275031310.jpeg)
![Women have the role of kinkeeper in almost all cultures. This may cause them to react to stress by ...](https://biology-forums.com/gallery/27/medium_660366_08_04_17_10_05_19_275551409.jpeg)