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zlopas [31]
3 years ago
15

Veins have a much lower blood pressure than arteries. Which of these prevents backflow of blood in veins?

Biology
1 answer:
serious [3.7K]3 years ago
6 0
<span>Most veins are equipped with valves to prevent regurgitation (reverse blood flow). The return of blood to the heart is assisted by the action of the skeletal-muscle pump, and by the thoracic pump action of breathing during respiration.

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
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Name the different types of bio molecules.
Over [174]

Answer:

The four major types of biomolecules are carbohydrates, lipids, nucleic acids, and proteins.

Explanation:

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2 years ago
What do cinders, ash, and lava all have in common?
likoan [24]

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I'd say it is C. They are all different forms that magma takes after a volcanic eruption

Explanation:

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4 0
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A part of an mRNA has the sequence CCG. Which change to this sequence
Flauer [41]

Answer:

A single nucleotide changes in CCG which will result in missense mutation can be many possibilities.

Explanation:

Missense mutations  

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• Mutation in first nucleotide codes for  

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• Mutation in second nucleotide specify for coding

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 CGG specifically encodes Arginine

• Mutation in Third Nucleotide will not result in missense mutation because any point mutation in third nucleotide of codon will encode same amino acid i.e Proline.  

4 0
3 years ago
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Dahasolnce [82]
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8 0
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Answer:

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