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e-lub [12.9K]
3 years ago
5

The umbilical cord contains _____ umbilical vein(s) and _____ umbilical artery(ies).

Biology
1 answer:
zimovet [89]3 years ago
8 0
The umbilical cord contains one umbilical vein and two arteries. Hope this helps.
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Identify the true statements regarding liver glycogen phosphorylase a. Protein phosphatase 1 is abbreviated PP1. The binding of
katrin2010 [14]

Answer:

Liver phosphorylase a concentration decreases when glucose enters the blood.

The binding of glucose to liver phosphorylase a shifts the equilibrium from the active form

As the concentration of phosphorylase a decreases, the activity of glycogen synthase increases. to the inactive form

Explanation:

Protein phosphatase 1 (PP1) is a phosphatase enzyme known to remove phosphate groups from serine/threonine amino acid residues. PP1 plays diverse biological roles including, among others, cell progression, control of glucose metabolism, muscle contraction, etc. In glucose metabolism, PP1 regulates diverse glycogen metabolizing enzymes (e.g., glycogen synthase, glycogen phosphorylase, etc). In the liver, glycogen phosphorylase catalyzes the rate-limiting step in glycogenolysis by releasing glucose-1-phosphate. Glycogen phosphorylase <em>a</em> is converted (and inactivated) into the <em>b</em> form by PP1, which catalyzes the hydrolysis of the phosphate bond between serine and the phosphoryl group. In the liver, glucose binds in order to inhibit glycogen phosphorylase <em>a</em>, thereby inducing the dissociation and activation of PP1 from glycogen phosphorylase <em>a</em>.  

5 0
3 years ago
What is the hypothesis
LekaFEV [45]

Answer:

a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Explanation:

8 0
4 years ago
Read 2 more answers
Typical cells in the human brain contain 46 chromosomes, if a brain cell undergoes mitosis, how many chromosomes do you expect t
vfiekz [6]

Answer:

Each daughter cell will have 46 chromosomes.

Explanation:

Because a chromosome becomes 2 chromosomes when split into two, the parent cell is still giving ech daughter cell thge same amopunt of choromsomes as it has.

6 0
3 years ago
Some viruses, especially animal viruses, have an envelope surrounding their nucleocapsid. This envelope may have viral proteins
amm1812

Answer:

Some viruses, especially animal viruses, have an envelope surrounding their nucleocapsid. This envelope may have viral proteins embedded in it. Why are the viral proteins more readily recognized and targeted by the immune system than the envelope?

1) Enveloped viruses are often coated with animal cell membrane as they leave the cell. This membrane is a major component of the viral envelope. The viral proteins are more readily recognized by the immune system, as they are more distinct from the materials normally found in and on the cells. However, the envelope can contain several types of viral components as well.

Explanation:

This envolope from viruses that has proteins are better for the immune system to recognize them.  Because enveloped viruses use similar mechanisms for delivery of genetic material into cells, there may be ways to prevent infection before viral entry that would be effective for large numbers of different viruses.

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4 years ago
Why is the Earth's gravity stronger than the Moon's gravity?
Nataliya [291]

Answer:

The greater an object's mass, the more gravitational force it exerts. So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. That's why the moon isn't pulled out of Earth's orbit by the gravity of larger planets or by the sun.

hope this helps

have a good day :)

Explanation:

3 0
3 years ago
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