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>
Here are some reason to prepare yourself for an SAT. Firstly, start early. We know that ideally you’ll like all the time in the world to prepare for a test. Secondly, set a goal. Have everything planned out so your organized. Thirdly, get a good night sleep. Getting the right amount of sleep will help you think and keep you energized for when you need to take the test. Some other reasons that involve this question are shoring up your weaknesses. If you already have strengths such as the written portion then it might make sense to to put your energy into a weakness. Eat well and prioritize. Therefore, being prepared for a test like this in advance will help you in many ways.
No... Down Syndrome is a chromosome deficiency that happens during conception when a spem and egg fertilize. Sometimes the X and Y Chromosomes don't add up correctly and can (sadly) cause this deficiency. Water in the mother's lungs can cause pneumonia which can potentially harm the fetus due to lack of oxygen. But this cannot cause down Syndrome. Water in the baby's lungs will also not cause Down Syndrome.
Eat healthy foods and exercise.
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