| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
blood cells |
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capillaries |
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bronchioles |
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diaphragms |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.
Which of the following is the smallest component of an element that still retains the properties of the element?
neutron |
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molecule |
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atom |
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element |
An atom is the smallest component of an element that still retains the properties of the element.
Absolute zero is which of the following?
0°C |
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the freezing point of hydrogen |
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the coldest temperature possible in the universe |
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the freezing point of oxygen |
In contrast to the Celsius scale (measured in degrees centigrade) that fixes 0° at the freezing point of water and the Fahrenheit scale that uses 32°, the Kelvin scale fixes 0 at absolute zero (-273°C) which is the lowest temperature possible in the universe.
In the pancreas, lipase converts fat to:
glycerol and fatty acids |
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simple sugars |
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amino acids |
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complex carbohydrates |
The acids produced by the pancreas contain several enzymes that aid in digestion. Lipase converts fat to glycerol and fatty acids. Pancreatic amylase breaks down complex carbohydrates into simple sugars. Trypsin converts polypeptides (the building blocks of protein) into amino acids.
Which of the following is the formula for power?
\(P = {\vec{w} \over t}\) |
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\(P = {w \over t}\) |
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\(P = w t\) |
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\(P = \vec{w}t\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).