Which of the following statements correctly describe(s) the driving forces for diffusion of Na+ and K+ ions through their respective channels?
Answers
Question:
Which of the following statements correctly describe(s) the driving forces for diffusion of Na+ and K+ ions through their respective channels? Select all that apply.
A)The diffusion of Na+ ions into the cell is facilitated by the Na+ concentration gradient across the plasma membrane.
B)The diffusion of Na+ ions into the cell is impeded by the electrical gradient across the plasma membrane.
C)The diffusion of K+ ions out of the cell is impeded by the K+ concentration gradient across the plasma membrane.
D)The diffusion of K+ ions out of the cell is impeded by the electrical gradient across the plasma membrane. The electrochemical gradient is larger for Na+ than for K+.
Answer:
"The concentration gradient and the electro-chemical gradient" describes the driving forces for diffusion of Na+ and K+ ions through their respective channels
Explanation:
The Na ions diffusion inside the cell is facilitated by the concentration gradient of the Na ions which is present across the plasma membrane. Hence, the diffusion of the K ions which is present outside the cell and will be impeded due to the electrical gradient which is present near the plasma membrane. Thus, the electro-chemical gradient is greater as compared to the Na ion than that of the K ion.
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Answers
Answer:
Taskmasters is Correct. The answer is Choice B.
I just took the quiz and got it Correct.
B. saponification
C. ionization
D. neutralization
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Answer: D. neutralization
Explanation:
1. Substitution reaction is defined as the reaction in which one atom replaces the other atom from the compound.
2. Saponification is a reaction in which fatty acids are made to react with alkalis to form sodium salt of fatty acids called as soaps.
3. Ionization is a type of chemical reaction in which a substance ionizes when dissolved in water.
4. Neutralization is a type of chemical reaction in which an acid reacts with base to produce salt and water.
Answers
V(insulin) = 425 ml; volume of solution.
d(insulin) = 20.0 mg/ml; density of solution.
m(insulin) = V(insulin) · d(insulin).
m(insulin) = 425 ml · 20 mg/ml.
m(insulin) = 8500 mg.
m(insulin) = 8500 mg ÷ 1000 ml/l.
m(insulin) = 8.5 g.
This reaction is best described as
(1) addition involving a saturated hydrocarbon
(2) addition involving an unsaturated hydrocarbon
(3) substitution involving a saturated hydrocarbon
(4) substitution involving an unsaturated hydrocarbon
Answers
This reaction is best described as substitution involving a saturated hydrocarbon. Therefore, the correct option is option C.
When one atom or group of atoms in a molecule is replaced by another atom or group of atoms, the chemical reaction is known as a substitution reaction. Usually, a reactant molecule and a reagent molecule, which supplies the replacing atom or group, engage in this reaction. Nucleophilic substitution and electrophilic substitution are the two primary categories of substitution processes. A nucleophile (a substance rich in electrons) can replace another atom or group in a molecule in nucleophilic substitution processes. A nucleophile combines with an electrophile (an electron-deficient species) in organic chemistry regularly to produce this kind of reaction, which results in the formation of a new molecule.
To know more about substitution reaction, here:
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involving a saturated hydrocarbon. You
have substitued a chlorine atom for one of the hydrogen atoms, and the hydrocarbon you start with (ethane) is fully saturated.
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Explanation:
As we all know that like disolves in like solvent.
Here both water and Ethanol are polar. Hence Ethanol soluble in water.
Moreover, both forms intermolecular hydrogen bonds. It enhances the solubility of ethanol.
Both water and Ethanol are called as associate liquids. Hence solubility is more.
Alcohols have higher boiling point than other hydrocarbons due to their polarity and from the fact that they form very strong intermolecular hydrogen bonding. This is due to the large difference in their electronegativity that forms between the oxygen and the hydrogen atom.
Answers
Answer:
The answer to your question is carbon. The masses of all isotopes are based on a comparison to the mass of a particular isotope of carbon123. This isotope is carbon-12, which has six protons and six neutrons in its nucleus. By definition, one atom of carbon-12 is assigned a mass of exactly 12 atomic mass units (amu), which is a unit of mass equal to one twelfth of an atom of carbon-1212. All other isotopes have their masses expressed as a fraction or a multiple of this standard unit. For example, the isotope hydrogen-1 has a mass of 1.0078 amu, which means it is slightly heavier than one twelfth of carbon-12. The isotope uranium-238 has a mass of 238.0508 amu, which means it is almost 20 times heavier than carbon-12. The reason why carbon-12 was chosen as the reference standard is because it is abundant, stable, and easy to measure3. I hope this answer helps you understand the concept of isotopes and atomic mass better.