The answer is b.
Normally, neuronal cell membranes have negative voltages across them (meaning that the inside is more negative relative to the exterior). In the event of an action potential (when a neuron fires), the first thing that happens is that the membrane depolarizes, meaning that the charge of the inside relative to the outside begins to reverse. This happens when voltage-gated ion channels allow sodium ions (Na+, positively charged) to rush through the membrane and into the cell. Thus, the polarity of the membrane charge begins to reverse (inside more positive, outside less positive), which is what we call depolarization.
Answer:
C) Reactants must be present in the exact molar ratios in the balanced chemical equations.
Explanation:
<span>If the pH of beaker #1 is 2, then what would the best prediction for the pH of beaker #2 be? Answer:3
</span><span>since 1 ml of the solution in beaker #2 is added to 99 ml of water in beaker #3, what would the predicted pH of beaker #3 be? Answer:5
</span>how many times greater is the concentration of h+ in beaker #1 than in beaker #3? Answer:1,000 times
When water (H2O) is added to liquid isopropanol to form a solution, then polar isopropanol molecules are attracted to polar water molecules at the surface of the water. It forms a solution of rubbing alcohol.
<h3>Isopropanol and water in the solution</h3>
Isopropyl alcohol is water-soluble and forms hydrogen bonds with molecules of water (H2O).
When H2O is added to liquid isopropanol to form a solution, H2O spread in a uniform way in the solution.
These isopropanol molecules can surround H2O molecules, which are carried into the solution.
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Phosphorus is a chemical element with the symbol P and atomic number 15, and it has 15 protons and neutrons. The atom of calcium has 20 neutrons and is represented by the symbol Ca.
A stable subatomic particle known as a protons has the symbol p, H+, or 1H+ having a positive electric charge of +1 e elementary charge. It has a mass that is 1,836 times greater than that of an electron and slightly less than that of a neutron (the proton–electron mass ratio). Nucleons are a collective term for protons and neutrons, each of which have masses of roughly one atomic mass unit (particles present in atomic nuclei).
Each atom's nucleus contains one or more protons. They supply the primary electric force that attracts and holds the atomic electrons together. The defining characteristic of an element, known as the atomic number, is the number of protons in the nucleus (represented by the symbol Z).
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