Answer:
Yes
Explanation:
I say yes because with the Earth's "sunscreen" layer waring down, the heat of the sun; even if the hole was in the north pole, could overheat the earth causing a change in all environments including the desert.
Answer:
mitosis: It is a process by which the duplicated genome in cell is separated into halves that are in nature.
It occur in three phases: interphases, karyokines and cytokinesis.
Cytokinesis: It is a process where the cytoplasm of cell divided two "daughter" cells.
It occur through two processes: in animals, in eukaryotic cell and one in plant cell.
Answer:
-4 is greater than -6 because it's closer to being a positive number than -6 is
4.75 billion years ago, a large star near what is now the Solar System went supernova, sending heavy element debris outward into the galaxy. Some of the debris, after traveling long distances through space, collided with a Hydrogen cloud.
Complete question:
The endplate potential (EPP) at the frog neuromuscular junction occurs because ACh simultaneously increases the conductance of the postsynaptic membrane to Na and K
Answer:
TRUE
Explanation:
The Acetylcholine neurotransmitter is released from the presynaptic cell by the process of exocytosis.
Once the molecule is in the intercellular space, it moves forward the postsynaptic membrane to join its receptor in the motor plate.
Once the joining has occurred, the receptor acquires a channel shape allowing the ion transference that will make possible the modification of the action potential. Ions traffic will consist of the pass of sodium and calcium to the interior of the cell and potassium to the exterior. Quantitatively, the interchange Na-K is the most significant.
K+ follows a concentration gradient, while Na+ follows an electrochemical gradient. The interchange results in an increase of positive charges in the interior of the muscular cell.
Whenever there is a sufficient number of Acetylcholine receptors are active, the depolarization threshold of the motor endplate is exceeded. This activates an action potential that extends to the rest of the muscle membrane.
