| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.81 |
| Score | 0% | 56% |
In the heart, blood flows from the right __________ to the lungs then back to the heart via the left __________.
ventricle, ventricle |
|
atrium, atrium |
|
ventricle, atrium |
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atrium, ventricle |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
blood cells |
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capillaries |
|
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.
As part of digestion, the liver produces bile which breaks down:
sugars |
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fat |
|
protein |
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starches |
The liver produces bile which emulsifies (separates) fat.
Sound travels fastest through which of the following media?
metal |
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vacuum |
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air |
|
water |
The speed of a sound wave will vary with the medium. Sound travels fastest through media that has particles that are very close together, like metal. Thus, it travels faster through water than through air and doesn't travel at all through a vacuum (there are no particles in empty space to vibrate).
Which of the following does not represent the freezing point of water?
32°F |
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0°F |
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0°C |
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273K |
The Fahrenheit scale fixes the freezing point of water at 32°F, the Celsuis scale at 0°C, and the Kelvin scale at 273K.