A human heart does not live on its own
without the human brain, the heart is dead
any organ in our human body is not a living thing
Answer:
Cell Y has a larger vacuole than cell X.
Explanation:
From the above observations I made out that cell X is animal cell and cell Y is a plant cell.
The DNA testing showed that the DNA from each of these bones, skull bones,determine indeed that they were Nicholas, Alexandra, and the three children.it is now generally accepted that the bodies of young Prince Alexei and his sister Princess Anastasia were partially cremated immediately after they <span>were shot. The soldiers then scattered their remains.</span>
Answer:
D) Na+ is used to repolarize the membrane.
Explanation:
Option D is wrong choice because it is K+ which is used to repolarize the membrane not Na+.
As soon as membrane gets depolarized because of influx of Na+ due to opening of voltage gated Na+ channels simultaneous opening of voltage gated K+ channels and closing of Na+ voltage gated channels takes place. As a result of which K+ moves out of the cell leading to drawing of electrochemical gradient out of the cell.
In order to achieve resting membrane potential, more Na+ must be out of the cell and more K+ must be inside the cell. There are many leaky channels on neurons from which Na+ has tendency to leak into the cell while K+ has the tendency to leak outside of the cell. So Na+/K+ pump which is located on the membrane of neuron keeps pushing Na+ outside of the cell and K+ inside the cell so as to maintain resting membrane potential which is -70 mV.