|
|
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
The FDA recognizes 118 routes of administration.
Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
![Functional MRI Scans These scans of human brains show localized average increases in neural activity](https://biology-forums.com/gallery/47/medium_6_31_03_15_7_18_49_211892310.jpeg)
![The mortality rate in the United States increases with age and is lower for women than men at every ...](https://biology-forums.com/gallery/47/medium_667187_21_02_17_6_13_00_256181578.jpeg)