| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.73 |
| Score | 0% | 55% |
During digestion, after proteins are broken down where does the undigested food go next?
stomach |
|
large intestine |
|
small intestine |
|
esophagus |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following represents the largest value?
1 cL |
|
1 kL |
|
1 ML |
|
1 mL |
Mega (M) is 106, kilo (k) is 103, centi (c) is 10-2, milli (m) is 10-3 so 1 ML represents the largest value.
What part of the nervous system controls simple reflexes?
spinal cord |
|
cerebrum |
|
medulla |
|
autonomic |
The spinal cord connects the brain to the body's network of nerves. It carries impulses between all organs and the brain and controls simple reflexes.
Scalar quantities are fully described by which of the following?
a magnitude only |
|
a magnitude and a direction |
|
a magnitude and a polarity |
|
a direction only |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
Absolute zero is which of the following?
the freezing point of oxygen |
|
the freezing point of hydrogen |
|
0°C |
|
the coldest temperature possible in the universe |
In contrast to the Celsius scale (measured in degrees centigrade) that fixes 0° at the freezing point of water and the Fahrenheit scale that uses 32°, the Kelvin scale fixes 0 at absolute zero (-273°C) which is the lowest temperature possible in the universe.