The answer to this question would be: <span>B. Receptor site
The receptor site of a neurotransmitter often only receives a specific kind of transmitter. That was because the receptor has a unique 3D structure, so different transmitter wouldn't fit into the receptor. That was similar to lock and key principles.</span>
Answer:
The best answer to the question: The change in energy consumption in the United States during the past 100 years is due to: a growth spurt in population, which means an increased need for energetic production and consumption, and also, the appearance of technological advances that require such energetic consumption.
Explanation:
According to statistical data, in the past 100 years in the U.S, the production and consumption of energy, in the form of electrical power, oil, coal and natural gas, has increased significantly compared to a period prior to those 100 years because of the increase in population, the expansion of that population to greater land areas, and most importantly, due to the appearance of technologies that have required such energy. Cars, planes, devices that require power, transportation of different kinds, have grown along with population growth and have marked the difference in the way, and the amount, that energy is consumed in the U.S.
