| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
In the heart, blood flows from the right __________ to the lungs then back to the heart via the left __________.
atrium, ventricle |
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atrium, atrium |
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ventricle, ventricle |
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ventricle, atrium |
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.
Which of the following does not filter air as part of the respiratory system?
epiglottis |
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pharynx |
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nasal cavity |
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trachea |
After air enters through the nose, it passes through the nasal cavity which filters, moistens, and warms it. Further filtering takes place in the pharynx, which also helps protect against infection, and then in the trachea which is just past the epiglottis which prevents food from entering the airway.
Which of the following is the narrowest classification of life?
species |
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family |
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genus |
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domain |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.
In the metric system, what prefix represents 10-3?
centi |
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kilo |
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mega |
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milli |
In the metric system, milli is the prefix for 10-3.
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
mouth |
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large intestine |
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stomach |
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small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.