Answer:
Explanation:
The cell membrane separates the cell from the outer environment. The extracellular fluid contains the sodium ions (Na+), chloride ions (Cl-), while intracellular fluid contains potassium (K +) and negative anions.
The potential difference arises when the membrane is selectively permeable to some ions. The resting potential is -70mV.
When the neurons get excited, the sodium ions start to enter by sodium channels.
Now there are more positive ions inside the cell membrane. It disturbs the resting potential i.e. -70mV. This stage is known as depolarization.
When the inside environment of the cell is more positively charged, the potassium ions start to move out of the cell. It goes out by the voltage-gated channels. Thus resting stage is maintained and it is known as repolarization.
But the initial stability of the cell membrane has to be maintained. To restore the resting stage, the sodium ions start to move out of the membrane and potassium ions enter into the cells again. This is an active transport and has done by the Na+ - K+ pump. Here 3 sodium ions move out and 2 potassium ions pumped into the cell through the plasma membrane.
Thus the resting potential regains. The potassium ions come back into the cells against the concentration gradient and ATP provides the energy for this phenomena.
The more the people, the more pollutant they generate which will pollute the the water.
Answer:
11) Weather changes from day to day, while climate changes from region to region.
12) Using the image here, we can trace the interaction of Earth's spheres. Plants (biosphere) draw water (hydrosphere) and nutrients from the soil (geosphere) and release water vapor into the atmosphere.
Hope this helps. :)
Carbon fixation, reduction phase, carbohydrate formation, and regeneration phase.
Both are made up of cells, charisma has a goldfish she keeps in a tank. she planted several underwater plants in the bottom of the tank.
<h3>How long do goldfish live for?</h3>
Goldfish have a lifespan Of about 10-15 years, with some sorts living up to 30 years when occupied with proper maintenance.
Thus, Both are made up of cells.
To learn more about goldfish click here:
brainly.com/question/1940313
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