Sentences with phrase «chemical signals within»

During the last decade, scientists have learned that neurexins are integral to the transmission of chemical signals within the nervous system.

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

Not exact matches

They depleted their reserves of these chemicals rapidly each time a new auditory signal came in, and they decreased the amount of space within the cells that housed sac - like structures called vesicles — biological storage tanks where neurotransmitter chemicals are kept.

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.

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

Sperry suggested that chemical signals, probably present in concentration gradients, serve as positional landmarks within the brain.

Seiden, 72, was one of the world's experts on how drugs, especially the amphetamines, could selectively damage certain neurons, particularly those that produced the neurotransmitters dopamine and serotonin — chemical signals that relay messages within the brain.

Your body uses a combination of hormones, chemicals, and hunger signals to help you stay within this weight range.

Animals produce natural hormones that carry chemical signals capable of influencing the behavior of other animals within the same species.