3 years ago

Why does the damage of the nervous system cause paralysis of the body?

1 answer:

4 0

Paralysis is most often caused by damage in the nervous system, especially the spinal cord. The nervous system is what give signals to the different parts of our body so that if it is damaged signals and messages could not be transported. If the central nervous system is damaged, paralysis frequently affects the movement of a limb as a whole, not the individual muscles.

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Calcium sulfide forms when calcium loses 2 valence electrons to sulfur. What type of a bond is formed? covalent ionic

il63 [147K]

A covalent bond is formed

4 0

3 years ago

In a lab about the activity series, a solution of copper(II)chloride is placed in a test tube with zinc metal. If zinc is higher

Tcecarenko [31]

Answer:

Option D, Zinc is higher on the activity series because there is clear evidence of a reaction.

Explanation:

It is very clear that a metal which is higher in activity will replace a metal having lower activity.

Since, Zinc has higher activity than copper, it is very sure that it in a copper chloride solution it will replace copper and produce zinc chloride solution leaving behind copper as residue.

Residues of copper is a clear evidence of reaction

The chemical equation for this reaction would be -

$CuCl_2 + 2Zn^+ -----> 2ZnCl + Cu^{2+}$