The slow or shuffling gait is caused by gradual progressive loss of control over moments due to inadequate (decreased) levels of the neurotransmitter <u>dopamine</u> in the brain.
<h3>What is are neurotransmitters?</h3>
These are body's chemical messangers which are released at the end of a nerve fibre by the arrival of a nerve impulse and, by diffusing across the synapse
So therefore, the slow gait is caused by gradual progressive loss of control over moments due to inadequate (decreased) levels of the neurotransmitter dopamine in the brain.
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Acetic acid and ether are pure substance because they can not be further broken down.
<h3>What is a homogeneous mixture?</h3>
A homogenous mixture consists only of single phase. A solution is comprised of a solute and a solvent while a colloid is a false solution.
The following is a classification of each of the items;
1- Acetic acid - pure substance
2- Ether - pure substance
3- Vinegar - homogeneous mixture
4- Gravy - colloid
5- Beef stew - colloid
6- Seltzer water - solution
7- Salad - colloid
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Mising parts;
Classify each of the following as a pure substance, homogeneous mixture, solution, or colloid.
1- Acetic acid
2- Ether
3- Vinegar
4- Gravy
5- Beef stew
6- Seltzer water
7- Salad
Because heat increases energy of the particles, making them move faster, thus making them collide faster...which makes it mix quicker and more efficiently