| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
digestion |
|
respiration |
|
nervous |
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circulation |
The trachea branches into the left and right bronchi which each lead to a lung where the bronchi subdivide into smaller tubes called bronchioles. Each bronchiole ends in a small sac called an alveolus which allows oxygen from the air to enter the bloodstream via tiny blood vessels called capillaries.
Arteries carry __________ blood at __________ pressure.
oxygenated, high |
|
deoxygenated, high |
|
oxygenated, low |
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deoxygenated, low |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.
Which of the following states of matter exists at the highest temperature?
liquid |
|
gas |
|
solid |
|
none of these |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
In the metric system, what prefix represents 103?
centi |
|
mega |
|
kilo |
|
milli |
Kilo is the metric system prefix for 103.
"An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." This describes which of Newton's laws of motion?
first |
|
third |
|
fourth |
|
second |
Also known as the law of inertia, Newton's first law of motion states that An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.