| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.13 |
| Score | 0% | 63% |
Which of these is not a component of blood?
white blood cells |
|
red blood cells |
|
marrow |
|
plasma |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
Absolute zero is which of the following?
0°C |
|
the freezing point of hydrogen |
|
the freezing point of oxygen |
|
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.
During digestion, where is digested food absorbed into the blood stream?
large intestine |
|
pancreas |
|
small intestine |
|
stomach |
The small intestine is where most digestion takes place. As food travels along the small intestine it gets broken down completely by enzymes secreted from the walls. These enzymes are produced in the small intestine as well as in the pancreas and liver. After the enzymes break down the food, the resulting substances are then absorbed into the blood via capillaries in the small intestine walls.
The heart __________ blood.
filters |
|
oxygenates |
|
creates |
|
deoxygenates |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.
In the food chain, omnivores may be which of the following?
primary or tertiary consumers |
|
secondary consumers or scavengers |
|
primary or secondary consumers |
|
secondary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.