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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Action of aldosterone on distal convoluted tubule epithelial cells. Action of aldosterone on distal convoluted tubule epithelial cells.
The renin–angiotensin–aldosterone pathway The renin–angiotensin–aldosterone pathway
Action of Steroid Hormones Action of Steroid Hormones
The renin-angiotensin-aldosterone pathway. The renin-angiotensin-aldosterone pathway.
The conserved DNA-binding domain in steroid receptors The conserved DNA-binding domain in steroid receptors
Renin-angiotensin-aldosterone system. Renin-angiotensin-aldosterone system.
Video: Action potentials - electrical characteristics and generation

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