A Shortage of Dopamine. Parkinson's disease occurs when nerve cells, or neurons, in an area of the brain that controls movement become impaired and/or die. Normally, these neurons produce an important brain chemical known as dopamine, but when the neurons die or become impaired, they produce less dopamine.arkinson's disease occurs when nerve cells, or neurons, in an area of the brain that controls movement become impaired and/or die. Normally, these neurons produce an important brain chemical known as dopamine, but when the neurons die or become impaired, they produce less dopamine.
Weight density is not a term. Weight is the effect of gravity on a Mass and will be less on the Moon since the moon has less mass and therefore less gravity than the Earth.Density is mass/volume and since mass is constant, density would also be constant.aking the world better, one answer at a time. Weight density is not a term. Weight is the effect of gravity on a Mass and will be less on the Moon since the moon has less mass and therefore less gravity than the Earth. Density is mass/volume and since mass is constant, density would also be constant.
Weight, yes. Mass, no. Density is mass per unit volume. Mass and Volume are constant no matter earth or moon. So it would be the same. Since weight does change because it is calculated with gravitational effects then yes you would get a different result.So mass, no.n the Moon, the same volume of water would weigh about 1/6 what it does on Earth. So weight density of water, or anything, on the Moon would be 1/6 compared to it on Earth. Starski Â· 6 years ago. Thumbs up.