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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.

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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

The platypus is very difficult to spot even on the surface of a river. The platypus is very difficult to spot even on the surface of a river.
How difficult is it for children to learn to speak two languages? How difficult is it for children to learn to speak two languages?
Items that would be difficult to replace bearing legal significance are sent by certified mail. Items that would be difficult to replace bearing legal significance are sent by certified mail.
It may be difficult for patients to get the vital minerals they need from their diets, so ... It may be difficult for patients to get the vital minerals they need from their diets, so ...
It is difficult to capture the anguish of the children of divorce, but when I read these lines by ... It is difficult to capture the anguish of the children of divorce, but when I read these lines by ...
The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ... The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ...
Video: X chromosome inactivation in calico cats

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