| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.73 |
| Score | 0% | 55% |
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
bronchioles |
|
capillaries |
|
diaphragms |
|
blood cells |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.
In the food chain, omnivores may be which of the following?
secondary or tertiary consumers |
|
primary or secondary consumers |
|
secondary consumers or scavengers |
|
primary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
During digestion, where is digested food absorbed into the blood stream?
small intestine |
|
large intestine |
|
pancreas |
|
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.
Which of these is not a function of bone in the human skeletal system?
store vitamins |
|
protect bodily organs |
|
store minerals |
|
produce blood cells |
Hard bones provide primary support for the endoskeleton while more flexible cartilage is found at the end of all bones, at the joints, and in the nose and ears. In addition to providing support and protecting bodily organs, bones also produce blood cells and store minerals like calcium.
As part of the carbon cycle, plants release carbon into the atmosphere through which process?
photosynthesis |
|
sedimentation |
|
decomposition |
|
evaporation |
The carbon cycle represents the ciruit of carbon through Earth's ecosystem. Carbon dioxide (CO2) in the atmosphere is absorbed by plants through photosynthesis. Plants then die and release carbon back into the atmosphere during decomposition or are eaten by animals who breathe (respiration) the carbon into the atmosphere they exhale and produce waste which also releases carbon as it decays.