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astra-53 [7]
3 years ago
13

Secretion of human chorionic gonadotropin (hcg) occurs during what time frame during pregnancy?

Biology
1 answer:
masha68 [24]3 years ago
3 0
Secretion of human chorionic gonadotropin [HCG] only occur during pregnancy in the placenta. The concentration of this hormone increase rapidly during the first three months of pregnancy; the amount in the blood stream doubles every two to three days as the development of the placenta and embryo progress. The hormone reaches its maximum concentration peak around the sixth week of pregnancy and after this, its concentration decline.
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what is difference between the name of an object versus the chemical formula?please answer my question I'm trying that from thre
Step2247 [10]

Answer:

Assuming you mean in a compound of elements: A name is just what you call it, and the chemical formula is what elements it is made of.

Explanation:

Take sodium chloride (Salt) for example. It's name is sodium chloride, but its chemical formula is NaCl. Na= Sodium, and Cl = Chlorine. So one sodium ion and one Chlorine ion create NaCl. Na+Cl=NaCl. And the name for the product of the formula is Sodium Chloride.

Another example is H2O (Water). H=Hydrogen and O=Oxygen. There are 2 hydrogens and one oxygen in H2O. H+H+O=H2O. The name for the formula is water.

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3 years ago
This picnic table was made from fallen trees in a local forest. Is this picnic table a biotic or abiotic factor? Explain your an
slava [35]

Q: this picnic table was made from fallen trees in a local forest. is this picnic table a biotic or abiotic factor? explain your answer.

A: the answer would be biotic because the term biotic means that something is living or had lived before. as you can see, the table was made by fallen trees in the local forest. that means it lived before the tree was fallen and carved into a picnic table.

hope this helps! ❤ from peachimin

6 0
3 years ago
Read 3 more answers
Motor innervation to the stomach is classified as
IceJOKER [234]
The answer to this question would be: visceral motor

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3 years ago
Why will other ecosystems be affected if freshwater ecosystems dry up?
vagabundo [1.1K]

Answer: a

Explanation:

7 0
2 years ago
UL
iren [92.7K]

Answer:

<em>The correct option is A) The cell theory is the result of explanations of scientists' observations and not a  description of the cell structure as it relates to the function.</em>

Explanation:

The cell theory can never become a law because Scientific theories are well-tested explanations, while laws are well-tested descriptions of  natural phenomena; one cannot become the other.

A scientific theory is subjected to be changed overtime but a law cannot change. We have observed many changes in the cell theory in the past and we might find changes in this theory in the future also. Hence, the cell theory can never become a law.

6 0
3 years ago
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