<span>Glial cells in the white matter help promote communication between the nerve impulses in the gray matter. They differ because in the peripheral nervous system there is more of a fatty substance that acts as a cushion between the impulses, which is a little different than helping the nerve impulses along intentionally. The cushioning may aid in transmission indirectly, but serves as more of a safety zone.</span>
Answer:
Earth's climate had remained relatively constant.
Explanation:
- Scientists have established that human-based activities have affected and are affecting a rapid change in the earth's climate as they have brought about massive changes in the global carbon cycles and affected the ecological systems.
- Earth is has an ever-changing climate and the variation in the orbit of earth results in natural changes such as seasons, which depend on the duration and intensity of the sunlight.
Answer:
The pH in water that comes from acid rain can reach up to 4, due to its combination with chemicals suspended in the air.
Explanation:
For this problem the options are:
A. 0
B. 4
C.10
D. 14
Normal rainwater typically has a pH of between 5 and 6 (average 5.5), but usually decreases when combined with polluting gases from industries and the use of fossil fuels.
Carbon monoxide, nitrogen oxides and sulfur dioxide are the main causes of acid rain, as combined with atmospheric water steam produce acids that are then part of precipitation, whose water has a pH of 4.
In addition:
- <em>0 is an extremely acidic pH.
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- <em>10 and 14 (options C and D) correspond to strong bases.
</em>
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B - They have different arrangements of atoms.