Explanation:
Only 10% of calories will be transfered to the next higher level.
5000 * 0.1 = 500.
500 calories will transfer to the secondary consumers.
You didn't really provide any possible answers here. However, it's very easy to say that the responsible actors for impulse transmission across the synapses from one nervous cell to another nervous cell is what we call neurotransmitters. These are special molecules that can have different effects when binding onto the required receptor sites.
Let's read the chemical equation for cellular respiration. The equation shows that cells use<span> six molecules of </span>oxygen<span> (6O</span>2<span>) to </span>break down<span> one molecule of </span>glucose(C6H12O6<span>). The arrow shows that when the sugar is broken </span>down<span> something else is produced. Energy, water, and carbon dioxide are produced.</span>
