<span>C. Several billion,,,,,,,,,,,,,,,,,,,,,</span>
Mass..... mass measures the amount of matter in a substance or object
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.
<span>Inertia refers
to a body or any physical object’s resistance to a change in motion. This
change in motion includes, speed, direction, or state of rest. Objects that
have moved will keep moving in a straight line at constant velocity. Inertia is
one of the fundamental principles of classical physics, for it describes
motions of objects and how they are affected when forces are applied on them.
Inertia is one of Isaac Newton laws from Philosophia Naturalis Principia
Mathematica. </span>
B, element
a molecule would require more than one atom. if one atom is left and is still gold, it would not be a molecule/mixture/compound.
