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allsm [11]
3 years ago
11

What placental hormone is responsible for prompting breast duct development and ligament flexibility during pregnancy?

Biology
2 answers:
Cloud [144]3 years ago
5 0

Answer:

Estrogen

Explanation:

grandymaker [24]3 years ago
3 0

Answer:

I don't know this one sorry

Explanation:

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At a PO₂ of 70 mm Hg and normal temperature and pH, hemoglobin is ________% saturated with oxygen. At a PO₂ of 70 mm Hg and norm
Arturiano [62]

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D) over 90

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As we can see in the image, the curve has a sigmoid shape, and this is due to the allosteric interactions between the subunits of the hemoglobin, which change their conformation with each oxygen molecule that binds in order to increase even more the oxgen affinity. This curve is constantly shifting to the right and to the left depending on the conditions of the blood, like temperature, pH, partial pressure of carbon dioxide and the concentration of diphosphoglycerate (DPG).

When the PO2 is around 70 mmHg, as we can see in the curve, the hemoglobin is saturated around 90% or more, reaching a plateu in the curve where the oxygen is not binding as fast anymore, because there are almost no more free binding sites left in the hemoglobin molecule.

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