The UV is needed by the skin to make previtamin D3. Previtamin D3 or cholecalciferol made from the skin will be changed in the liver into 25- hydroxyvitamin D3 and then sent to the kidney to be changed into 1,25- dihydroxyvitamin D3. The last change in the kidney will active the vitamin D. Vitamin D has a role in the calcium absorption which was will strengthen the bone tissue.
Let me explain to you: Taxonomy helps us understand relationships amongst organisms on Earth by grouping similar organisms together and creating links between all living things on Earth. For example, in order to get <span>evidence they can use DNA structure, if a higher percentage of their DNA is shared then they are more closely related</span>
If the cytoplasm of a cell is at ph 7, and the mitochondrial matrix is at ph 8, this means that the concentration of H+ ion is tenfold higher in the cytoplasm than in the mitochondrial matrix.
<h3>What is pH?</h3>
pH means the power of hydrogen and it is a measure of the degree of acidity or alkalinity of a solution.
The pH tells us how acidic or alkaline a solution is. It ranges on a scale of 1 - 14.
- pH of 1 - 6 indicates acidity
- pH of 7 indicates neutrality
- pH of 8 - 14 indicates alkalinity
According to this question, the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8. This suggests that the concentration of hydrogen ion (H+) ion is tenfold higher in the cytoplasm than in the mitochondrial matrix.
Learn more about pH at: brainly.com/question/13978769
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Oxygen is required for aerobic respiration. This reaction produces ATP (universal currency for energy) which our bodies use to survive. Without oxygen much less ATP is produced, as aerobic respiration cannot occur in the lack of oxygen. ATP can be formed by anaerobic respiration, in the lack of oxygen, but this produces far far fewer molecules of ATP. This also produces lactic acid causing us to become fatigued and tired. Thus oxygen is crucial to produce the maximum amount of ATP possible.
Glucose is the main molecule which is respired by our bodies to produce ATP/ energy, which our bodies use to survive. Oxygen and glucose react in the mitochondria to make ATP (release energy.) It therefore, is called a respiratory substrate.
Note: I'm avoided talking about the exact phases of respiration as it is usually not covered till college/ A level standards. If you would like to know exactly which reaction requires oxygen and how it's used (i.e. the stages of respiration) don't hesitate to ask.
The answer is 1.9 millimeters.
Solution
To get the mL value, you have to multiply the following:
(18.6 kg)(<span>5 mg/kg)(3mL/150mg)=mL
The technique here is that you have to think of isolating the unit you are finding and then you have to find a way that you can divide the units until you will find your needed unit. In the solution, you can see that kg/kg=1 and mg/mg=1 so the only unit left is mL. There you can get your answer. Don't be confused by the reciprocal of 150mg/3mL because it is only to get your needed answer.</span>
