Which animals have an internal clock set to a 47-hour life cycle? Detailed answer

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Which animals have an internal clock set to a 47-hour life cycle? Detailed answer

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Which animals have an internal clock set to a 47-hour life cycle?

All animals observe the so-called circadian rhythm, that is, the cyclic change of biological processes in the body, tied to the 24-hour length of the earth's day. The need to maintain a circadian rhythm is genetically based, since even blind creatures can perceive changes in light with photoreceptors on the skin. However, an eyeless fish Phreaticthys andruzzii has recently been discovered living in underground caves, in which the internal clock is set not to 24, but to 47 hours. A mutation is to blame for this, which turned off all the light-sensitive receptors on the body of these fish.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Why do we get tired?

Fatigue can be considered one of the types of poisoning! When the muscles of our body do some work, they produce lactic acid. If you remove lactic acid from a tired muscle, then we can immediately start working again! During muscle activity, the body also produces other substances known as fatigue toxin, or kenotoxin. The blood carries it throughout the body, and therefore the muscle itself, the whole body, and especially the brain, feel tired.

Scientists have conducted interesting experiments related to fatigue. If you force a dog to work until exhaustion, after which he falls asleep, and his blood is transfused into another dog, then the second dog will immediately feel tired and fall asleep too! If you pour the blood of a cheerful dog into a sleeping tired dog, then the latter will immediately wake up, not feeling tired anymore! But fatigue is not only a chemical process, it is also a biological process.

We cannot simply remove fatigue, we must give rest to the cells of the body. Losses must be restored, the nerve cells of the brain must be "recharged", and the joints of the limbs must restore the developed lubrication.

Sleep is also necessary to restore the energy of the body after it gets tired. In many cases, the best way to restore vigor in a tired body is by activating other parts of the body! Sometimes activity really helps to relax, because it enhances breathing. Blood begins to circulate faster, glands work more actively, and waste products are removed from tired parts of the body. But if you are completely exhausted, then it is best to sleep.

Test your knowledge! Did you know...

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Nanorobot Generator 12.06.2007

US scientists have made a device that can power a nanorobot.

About a year ago, professor at the Georgia Institute of Technology (USA) Tsong Ling Wang proposed creating electricity generators for nanorobots using zinc oxide nanowires. This year, scientists under his leadership managed to realize the idea and make a prototype of a generator capable of delivering direct electric current. According to calculations, one cubic centimeter of such a generator can produce a huge voltage for a nanorobot - up to 4 V.

The generator is set up like this. Thousands of zinc oxide nanowires half a micron long have been grown on a gallium arsenide substrate. Between the wires and the substrate is a layer of zinc oxide - it collects electricity. And the second electrode consists of silicon oxide, on which thousands of bumps are grown, forming zigzag lines.

These tubercles are covered with platinum and are capable of conducting current. Under the action of vibration, the nanowires, firstly, generate electricity due to the piezoelectric effect, and secondly, their tips oscillate and close to the tubercles of the second electrode. This creates an electric current in the circuit.

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