| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
What prevents blood pumped out of the ventricles from flowing back into the heart?
platelets |
|
valves |
|
capillaries |
|
atria |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
The two heart chambers that pump blood called:
ventricles |
|
atria |
|
valves |
|
aorta |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
Plant cells may generate energy through which of the following?
anaerobic respiration |
|
photosynthesis |
|
aerobic respiration |
|
all of these |
Some plant cells produce their own energy through photosynthesis which is the process by which sunlight, carbon dioxide, and water react to make sugar and oxygen. Animal cells cannot produce their own energy and, instead, generate energy when mitochondria consume outside sugar and oxygen through aerobic respiration.
A human heart consists of how many chambers?
4 |
|
8 |
|
2 |
|
1 |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
In cell biology, what part of the cell contains organelles?
cytoplasm |
|
cell wall |
|
nucleus |
|
cell membrane |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.