| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.56 |
| Score | 0% | 71% |
As part of digestion, the liver produces bile which breaks down:
sugars |
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protein |
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fat |
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starches |
The liver produces bile which emulsifies (separates) fat.
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
arthropod |
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sentient |
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vertebrate |
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spiny |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
An element in the physical state of __________ maintains a constant volume but their shape depends upon the shape of their container.
solid |
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gas |
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liquid |
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plasma |
In the liquid state, molecules flow freely around each other and exist at a higher temperature range than the same substance in a solid state. Liquids maintain a constant volume but their shape depends upon the shape of their container.
Which of these does not contain oxygenated blood?
pulmonary vein |
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left ventricle |
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aorta |
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right atrium |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.
The hottest of Earth's atmospheric layers is which of the following?
thermosphere |
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troposphere |
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mesosphere |
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stratosphere |
Temperatures again increase with altitude in the thermosphere which is the hottest (4,530 °F / 2,500 °C) atmospheric layer due to direct exposure to the Sun's radiation. However, the gas in this layer is highly diluted so even though the atoms of gas may be very high in temperature, there are too few of them to effectively transfer much heat.