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Serga [27]
3 years ago
13

Norepinephrine acts on the heart by ________. A) decreasing heart contractility B) causing a decrease in stroke volume C) blocki

ng the action of calcium D) causing threshold to be reached more quickly
Social Studies
1 answer:
kakasveta [241]3 years ago
8 0

Answer: option d

Explanation:they are also normally called noradrenaline.

They do help by constant regulating of the blood pressure and to increase the sugar (glucose) level content in the blood. It help majorly to lift up (increase) the rate as well as the force of the contraction of the heart and also in do lead to an increase in muscle contraction due to the fact that they are push out(realeased) from the sympathetic nerve fibre ends.

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Which of the following correctly explains the relationship between international trade agreements and protectionist trade polici
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The relationship between international trade agreements and protectionist policies is A. International trade agreements usually mitigate protectionist trade policies by reducing barriers to trade.

<h3>How do trade agreements relate with protectionist polices?</h3>

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2 years ago
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3 years ago
A colonist who was on the side of England
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Answer the following short answer questions with one complete paragraph each, the Word document should have at least 400 words w
Elina [12.6K]

Answer:

Deforestation, and especially the destruction of rainforests, is a hugely significant contributor to climate change. Scientists estimate that forest loss and other changes to the use of land account for around 23% of current man-made CO2 emissions – which equates to 17% of the 100-year warming impact of all current greenhouse-gas emissions.

As children are taught at school, trees and other plants absorb CO2 from the air as they grow. Using energy from the sun, they turn the carbon captured from the CO2 molecules into building blocks for their trunks, branches and foliage. This is all part of the carbon cycle.

A mature forest doesn't necessarily absorb much more CO2 that it releases, however, because when each tree dies and either rots down or is burned, much of its stored carbon is released once again. In other words, in the context of climate change, the most important thing about mature forests is not that they reduce the amount of CO2 in the air but that they are huge reservoirs of stored carbon. If such a forest is burned or cleared then much of that carbon is released back into the atmosphere, adding to atmospheric CO2 levels.

Of course, the same process also works in reverse. If trees are planted where previously there weren't any, they will on soak up CO2 as they grow, reducing the amount of greenhouse gas in the atmosphere. It is thought that trees, plants and other land-based "carbon sinks" currently soak up more than a quarter of all the CO2 that humans add to the air each year – though that figure could change as the planet warms.

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Explanation:

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