Sentences with phrase «when chemical signals»

To see how angelfish behavior changed when those chemical signals were diluted by routine water changes, researchers replaced up to half of the water in tanks holding three angelfish.

Not exact matches

Chemical Pregnancy / Early Miscarriage: When you fall pregnant your body makes progesterone and hCG, two hormones that signal the rest of the body that pregnancy is happening.

When milk isn't removed often enough, your body sends out chemical signals to slow production.

When you or your child comes in contact with egg proteins, immune system cells (antibodies) recognize them and signal the immune system to release histamine and other chemicals that cause allergic signs and symptoms.

When the team applied the technique to a sample of the organic molecule PTCDA, not only did the molecules show up in intricate detail, an electrical signal was also detected between them (coloured green below), at exactly the locations where hydrogen bonds are present (Journal of the American Chemical Society, DOI: 10.1021 / ja104332t).

Experiments in the lab and in the field showed that termites eavesdrop on the micro-vibrations made when ants move around, rather than on chemical signals.

When these bacteria are placed inside an animal, an ultrasound detector can pick up those signals and reveal the microbes» location, much like sonar waves bouncing off ships at sea, explains study coauthor Mikhail Shapiro, a chemical engineer at Caltech.

When light hits cryptochromes, they undergo chemical reactions that may be influenced by the direction of Earth's magnetic field, providing a signal of the bird's orientation.

When a T cell detects one, it morphs into a fighting machine, zapping invaders with lethal chemicals, multiplying into an army of identical killers or signaling other immune - system troops to join the attack.

Frey and his colleagues made use of mathematical models to analyze the complex interplay between ecological factors and population dynamics, and were able to demonstrate that populations can indeed respond in a coordinated fashion to chemical information even when the signal molecules are generated by only a subset of the cells.

In the latest issue of the Journal of Great Lakes Research, they describe a potent pheromone that Eurasian ruffe emit when injured, and this chemical signal repulses other ruffe.

When attractant or repellant chemicals attach themselves to receptor sites on the surface membrane of a bacterium, it triggers a process within the cell that leads to the modification of the signal protein, CheY (pronounced «Key - Y»), enabling it to bind to the switch and change the bacteria's direction of movement.

Although not an antioxidant, the mineral partially blocks cells» docking sites for glutamate, the chemical signal that overexcites nerve cells when noise becomes excessive.

The researchers hypothesize that the ants use chemical signals called pheromones to determine when the nest has the right proportion of soldiers to other workers.

Jarjour and his team studied a family of immune response genes called toll - like receptors (TLRs), which are responsible for sending out chemical «danger signals» when a bacteria or virus is detected.

By telling brain cells when they have struck gold, the chemical apparently signals them to keep doing whatever they did that led to success.

Now researchers say that some can even call for help: When chewed by tobacco budworms, many crops will send out a chemical distress signal to attract wasps that prey on the budworms.

Lu's team settled on a biological program that rewrites a living cell's DNA when the cell senses a signal — from a flash of light to the presence of a chemical.

An engineered gene circuit that coordinates bacteria via signaling chemicals (green circles) makes them die off when the culture gets too crowded.

When a chemical binds to the receptor, it generates a signal within the cell that alerts it to a nearby toxin, for example.

When Lin engineered the telomerase - expressing hepatocytes to die in response to a chemical signal and gave the mice with a liver - damaging chemical, he found that those animals in which the telomerase cells had been killed exhibited much more severe liver scarring than those in which the cells were functional.

When an electrical signal arrives at a nerve terminal and needs to be passed along to the next neuron, neurotransmitters, or chemical messengers, packed in vesicles mediate this process.

Male flies become aroused when they sense certain chemical signals from a female, and this leads to courtship behavior that includes a song generated by wing vibration.

For instance, stem cells seem to pick up chemical signals from surrounding bone cells about when to divide and what types of cells to create.

When they looked at brains from these mice, the researchers noticed that hippocampal nerves that were between 1 and 2 months old could dramatically increase or decrease the amount of signaling chemicals they receive from neighboring nerves.

When the body is attacked by microbes, macrophages release a flurry of chemical signals that trigger inflammation.

Scientists suspect that it inhibits the chemical signals within the brain that convey pleasure when people use drugs such as alcohol or nicotine.

«When faced with a chemical agent,» he said, «the electrical activity is reduced quite a bit, and the signals are erratic.»

region, called the suprachiasmatic nucleus, released a chemical that's been known to signal when there's an itch that needs to be scratched.

Shape changeable nodes could also comprise a shape changeable membrane that could expand and contract when stimulated by an electrical or magnetic signal or by chemical stimulus.

When you don't drink enough water, your body will react by retaining sodium and sending a signal to the pituitary gland to secrete vasopressin (a chemical that causes constriction of the blood vessels), resulting with elevated blood pressure.

When injected, the chemical appears to kill off nerve endings and receptors that are responsible for sending pain signals to the brain.

Chronic inflammation occurs when your body receives on - going stress signals that activate the immune system to continue producing inflammatory chemicals.

When we are faced with a threat, stress hormones are produced that send chemical signals throughout the body, including to the brain.

This pheromone replicates the «feel good» chemical signal that cats use when rubbing their face against a familiar object.

An instinctive activity that begins when kittens are five weeks old, scratching allows cats to leave chemical and visual signals that, among other functions, serve as «messages» to other cats and animals.

The clinical name for itchy skin in dogs is pruritus, which occurs when chemical reactions at the epidermis level irritate nerves and send «itch» signals to the dog's brain.

One variety of fish, called the gobi, acts as a bodyguard when it receives chemical signals from the coral indicating danger.