|
|
There are more sensory neurons in the tongue than in any other part of the body.
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.
The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
![Leafcutter ants carrying leaf fragments back to the nest where they will be processed to create a su](https://biology-forums.com/gallery/47/medium_33_09_09_11_10_15_38_1724111.jpeg)
![(a) Homologous traits are similar due to shared ancestry. (b) Analogous traits (bats’, birds’, and f](https://biology-forums.com/gallery/47/medium_234464_20_01_15_11_04_39_202642177.jpeg)