Answer:
The left side of the heart receives oxygenated blood from the pulmonary vein and pumps it into the aorta, while the right side of the heart receives deoxygenated blood from the vena cava and pumps it into the pulmonary vein. The pulmonary vein and aorta also have valves connecting them to their respective ventricle.
Explanation:
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Carbohydrates are the body's primary and most immediate source of energy.
This is because carbohydrates are broken down by an enzyme called carbohydrase into glucose. Glucose is the immediate energy source.
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The train traveled 100km (50x2) down and then 375km (75x5) up. So the train is 275km (375-100) up from where it started.
Sycamore trees (Platanus occidentalis) make handsome shade trees for large landscapes.

The correct statement is that the concentration of acetylcholine will be inhibited by enzymes and can cause several diseases as follows:
- Alzheimer's disease-related to damage to brain cells,
- memory loss,
- and thinking ability.
How to reduce the symptoms of these diseases is to use drugs that contain cholinesterase inhibitors.
<h2>Further Explanation
</h2>
Acetylcholine is a neurotransmitter that plays an important role in the functioning of the autonomic nervous system. Acetylcholine is one of the most commonly recognized neurotransmitters or nerve stimulating chemicals. These neurotransmitter compounds can be found in the nervous system.
There are several side effects of the acetylcholine drug, which are as follows:
- Can cause a lot of sweat
- Excessive salivation
- Stomach ache
- Headache
- Blood vessel dilation
- Nausea and vomiting
- Diarrhea is a sign of an increase in parasympathetic tone.
Learn More
- about chemicals brainly.com/question/8735339
- about enzymes brainly.com/question/6577765
Details
Grade: Middle School
Subject: Biology
Keyword: chemicals, enzymes, Acetylcholine, neurotransmitter