Transport of Na+ from a place of low concentration to a place of higher concentration. <u>This is the right answer.</u>
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The sodium-potassium pump is the most common and well-known example of active transport. At the cell membrane, the sodium-potassium pump moves 3 sodium ions out of the cell and two potassium ions into the cell per ATP. Examples of active transport include the uptake of glucose in the human intestine and the uptake of minerals and ions into the root hair cells of plants.
One of the greatest examples of active transport is the movement of calcium ions out of cardiomyocytes. Cells secrete proteins such as enzymes, antibodies, and various other peptide hormones. Amino acids are transported across the intestinal mucosa of the human intestine. The movement of ions or molecules across cell membranes to regions of a higher concentration is assisted by enzymes and requires energy.
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Answer:
200 L per day
Explanation:
If there is 1 mg of F- per L of water, we can calculate the volume for 2 g like this:
1) Converse the toxic mass of fluoride to miligrams
1 g ------- 1000 mg
0.2 g ---- X
X = 200 mg
2) Calculate the liters of fluoridated drinking water that a person can consume to reach 200 mg
1 mg -------- 1 L
200 mg ---- X
x = 200 L
Answer:
Ernest Rutherford postulated the nuclear structure of the atom, discovered alpha and beta rays, and proposed the laws of radioactive decay. He received the Nobel Prize in Chemistry in 1908.
Erwin Schrödinger proposed the quantum mechanical model of the atom, which treats electrons as matter waves. ... The Heisenberg uncertainty principle states that we can't know both the energy and position of an electron.
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Answer:
the work done on the gas is 4,988.7 J.
Explanation:
Given;
number of moles of the monoatomic gas, n = 4 moles
initial temperature of the gas, T₁ = 300 K
final temperature of the gas, T₂ = 400 K
The work done on the gas is calculated as;
For monoatomic ideal gas: 
Where;
R is ideal gas constant = 8.3145 J/K.mol
Therefore, the work done on the gas is 4,988.7 J.
