| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.85 |
| Score | 0% | 57% |
The __________ nervous system regulates involuntary activity in the heart, stomach, and intestines.
central |
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autonomic |
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somatic |
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peripheral |
Part of the peripheral nervous system, the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.
Elements in the Periodic Table of the Elements are ordered by which of the following?
number of electron shells |
|
atomic weight |
|
atomic mass |
|
atomic number |
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their location |
|
their density |
|
their temperature |
|
their size |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
|
small intestine |
|
stomach |
|
esophagus |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
In which type of compound are electrons shared between atoms?
covalent |
|
chemical |
|
ionic |
|
molecular |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.