FEEDBACK MECHANISM is a regulatory mechanism in which presence of certain level of substance promotes or inhibits its further formation.
The regulation of secretion of Thyrocalcitonin from thyroid gland is an example of such feedback control mechanism. It occurs in two ways:
a) When calcium levels are too high, the thyroid detects this and releases calcitonin. calcitonin stimulates the kidneys to release more calcium and it causes bones to absorb more calcium and build more matrix. This is called Negative Feedback Control.
b) In response to a decrease in calcium levels, parathyroid hormone is released, which causes the release of calcium from bone and retention of calcium in the body, and the calcium level rises back to normal. This is called Positive Feedback Control.
The displaced fracture is caused when the bone breaks into two or more parts and the bones are no longer in alignment with each other. These broken bones becomes abnormally arranged. Normally, these fractures are caused due to trauma. The bone breaks or cracks, and gets displaced from its original position, and then it gets arranged in the abnormal position.
Hence, the blank can be filled with 'displaced'.
It’s the first answer choice :)
Answer:
Researchers estimate global economic losses from fossil fuel air pollution at $2.9 trillion each year, or approximately 3.3 percent of global GDP.
Answer:
a
Explanation:
for an animal cell, the main advantage of aerobic cellular respiration over lactic acid fermentation is that more energy is released from each glucose molecule
