He was not worry at all because he had a authority to act
I believe the answer is: Nitric oxide
<span>Nitric oxide could be synthesized on demand, because it is considered to be membrane permeant that cannot be stored. Calcium influx through </span><span>The N-methyl-D-aspartate </span>receptor activates nitric oxide synthase (NOS), which synthesizes Nitric oxide from L-arginine which allow it <span> to act as a retrograde messenger from the dendrite to the terminal button. </span>
I believe the answer is: They are based on the arbitrary borders of old European empires
African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.
In Mathematics, the three-dimensional objects having depth, width and height are called <u>solid</u> <u>shapes</u>.
<h3>What are three-dimensional objects?</h3>
The three-dimensional objects are shapes that have a third dimension- depth. Examples of a three-dimensional objects include cubes, prisms, pyramids, spheres, cones, and cylinders are all examples of three-dimensional objects. Three-dimensional objects can be rotated in space.
Therefore, an object that can be defined in three-dimensions is a solid shape.
learn more about Three-dimensional objects: brainly.com/question/23451265
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