| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.54 |
| Score | 0% | 71% |
Which of the following does not filter air as part of the respiratory system?
pharynx |
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epiglottis |
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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.
The energy posessed by a ball on the window ledge of a tall building is an example of what kind of energy?
inherent |
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kinetic |
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potential |
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gravitational |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
The energy posessed by a thrown baseball is an example of what kind of energy?
potential |
|
gravitational |
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transitional |
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kinetic |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
In the heart, the __________ artery and vein manage blood flow to the lungs.
capillary |
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pulmonary |
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atrial |
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aorta |
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.
The rate of vibration of sound is called:
volume |
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amplitude |
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frequency |
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period |
The rate of vibration of sound is called frequency and is measured in hertz (Hz). One hertz is one repetition per second and sounds with high frequency have a higher pitch than sounds with lower frequency. Humans can hear sounds in the range of 20 Hz to 20 kHz.