| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
In the metric system, what prefix represents 10-3?
centi |
|
milli |
|
kilo |
|
mega |
In the metric system, milli is the prefix for 10-3.
In the heart, the __________ artery and vein manage blood flow to the lungs.
pulmonary |
|
atrial |
|
capillary |
|
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 hottest of Earth's atmospheric layers is which of the following?
mesosphere |
|
troposphere |
|
thermosphere |
|
stratosphere |
Temperatures again increase with altitude in the thermosphere which is the hottest (4,530 °F / 2,500 °C) atmospheric layer due to direct exposure to the Sun's radiation. However, the gas in this layer is highly diluted so even though the atoms of gas may be very high in temperature, there are too few of them to effectively transfer much heat.
Poor balance could indicate an issue with which part of the nervous system?
medulla |
|
cerebrum |
|
spinal cord |
|
cerebellum |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
As part of digestion, the liver produces bile which breaks down:
sugars |
|
starches |
|
fat |
|
protein |
The liver produces bile which emulsifies (separates) fat.