The innermost cells of the are continuously dividing through mitosis to form new cells.

1 answer:

5 0

The innermost cells of the epidermis are continuously dividing through mitosis to form new cells. The newly formed cells move up through the epidermis toward the skin surface, while producing a tough, fibrous protein called keratin.

You might be interested in

After you note a murmur in a newborn, the pediatric cardiology consultant diagnoses a patent ductus arteriosus. Why is this a ca

saw5 [17]

Answer:

Patent ductus arteriosus (PDA) is an extra blood vessel found in babies before birth and just after birth.

Explanation:

The ductus arteriosus is a normal blood vessel that connects two major arteries — the aorta and the pulmonary artery — that carry blood away from the heart.

The lungs are not used while a fetus is in the womb because the baby gets oxygen directly from the mother's placenta. The ductus arteriosus carries blood away from the lungs and sends it directly to the body. When a newborn breathes and begins to use the lungs, the ductus is no longer needed and usually closes by itself during the first 2 days after birth.

If the ductus doesn't close, the result is a patent (meaning "open") ductus arteriosus. The PDA lets oxygen-rich blood (blood high in oxygen) from the aorta mix with oxygen-poor blood (blood low in oxygen) in the pulmonary artery. As a result, too much blood flows into the lungs, which puts a strain on the heart and increases blood pressure in the pulmonary arteries.

7 0

2 years ago

Processing of the mRNA begins before transcription of eukaryotic mRNA's is complete. The end of the mRNA is prepared for recogni

omeli [17]

Answer:

Capping occurs at 5' end of the mRNA.

Explanation:

Eukaryotic cell process the mRNA in nucleus before it moved to the cytoplasm for protein synthesis.

The RNA that is direct copy of DNA is called primary transcript.

The molecule that's directly made by transcription in one of your (eukaryotic) cells is called a pre-mRNA, reflecting that it needs to go through a few more steps to become an actual messenger RNA (mRNA). These are:

Capping: mRNA capping happens at the 5' end of the mRNA, usually adds metjyguanosine after RNA polymerase makes the 5' end of the primary transcript

Polyadenylatio:Addition of a poly-A tail (tail of A nucleotides) to the 3' end of the RNA

Intron splicing:Chopping out of introns, or "junk" sequences, and pasting together of the remaining, good sequences (exons)

Once it's completed these steps, the RNA is a mature mRNA. It can travel out of the nucleus and be used to make a protein.

4 0

2 years ago

Which of these processes in the water cycle occurs at a higher rate during a tornado

dybincka [34]

You have to show the option for anyone to help

6 0

2 years ago

An autopsy report for a deceased individual lists natural causes as the manner of death. Which is the most likely cause of death

Olenka [21]

The answer is heart attack, it is a naturally occurring cause of death

6 0

2 years ago

A group of engineers have launched a space probe from Earth that will land on the surface of Mars. How will the force of gravity

fomenos

I think it is because yes

7 0

2 years ago