When Loewi triggered a nerve that affected a frog's heart rate, he was able to remove fluid from the region surrounding the heart, transfer it to another frog's heart, and subsequently affect that frog's heart rate as well.
<h3>What are Neurotransmitters?
</h3>
Neurotransmitters, which are organic compounds, play a major role in the language that neurons use to communicate with one another and with their final targets. Following electrical stimulation, these substances are produced and act on their particular receptors to start a response that can be as simple as a muscle contraction or as extremely complex as starting a chain reaction that eventually changes how the organism behaves. Neurotransmitters can have multiple functions; depending on where they act, they can be neuromodulators or, in some cases, neurohormones.
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Answer:
It's A
Mountains, rivers, and deserts created barriers to the outside world.
Explanation:
I took the assignment
and got it right
The event that defines<em>"The shot heard round the world" </em> is <em>"It was the first shot fired in the Revolutionary War." </em>The phrase belongs to the poem<em> "Concord Hymn" </em>by Ralph Waldo Emerson, written in 1837. Emerson describes the events that took place at the North Bridge in Concord on April, 19th 1775 where the first British soldiers were shot dead by the American militia. This is considered to be the first clash in the Battles of Lexington and Concord, and the beginning of the American Revolutionary War.
The same phrase is also used to refer to the assassination of Archduke Franz Ferdinand in Sarajevo on June, 28th 1914. This event is considered to be one of the main causes which led to World War I.
Answer:
Once the contingency was restored, the sad babies turned away
.
Explanation:
Babies associated the rope with the moment of happiness, as the string provided feelings of happiness and pleasure for them. As scientists withdrew these elements of happiness, babies could no longer have those sounds and images that made them happy, so the association between the string and happiness came out of their heads more and more until the moment came. they completely disassociated the rope of happiness and began to grow sad and turned away.
As a result, scientists concluded that since pulling the rope no longer turned on the attractive stimuli, and the emotional reactions of babies, they changed the feeling of happiness to anger and sadness. Once the contingency was restored, the sad babies turned away.
Back in that time, the Roman Army was considered to be the most advanced army in strategy, ect. They created the Roman Empire. However, Rome itself, actually benefited from them because of the money and treasures brought back from the territory's that they conquered.