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Softa [21]
3 years ago
12

If a second stimulus arrives before the relaxation phase has ended, a second, more powerful contraction occurs. This addition of

one twitch to another is called If a second stimulus arrives before the relaxation phase has ended, a second, more powerful contraction occurs. This addition of one twitch to another is called recruitment. complete tetanus. wave summation. treppe. incomplete tetanus.
Biology
1 answer:
lyudmila [28]3 years ago
3 0

Answer:

The correct answer is - wave summation.

Explanation:

Wave summation or temporal summation is a physiological process or phenomenon that takes place when the previous relaxation phase has not complete and another stimulus is applied to a muscle which leads to a stronger contraction to the muscle.

Such a condition occurs due to a smaller refractory period than the contraction and relaxation phases. As the previous contraction effects are stiil present in the muscle the next stimulus and contraction leads to a much stronger contraction than previous.

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Answer:

The first anticodon leaves the ribosome through the E-site

Explanation:

Translation is the second stage of gene expression. It occurs in the ribosomes (organnelles of protein synthesis) where amino acid sequence is synthesized using a mRNA template. The tRNA (transfer RNA) is responsible for reading the mRNA codon using its ANTICODON, which is complementary to the mRNA codon.

The tRNA reads the mRNA codon and carries the amino acid that corresponds what it reads. tRNA has three binding sites on the ribosome; A-site, P-site and E-site. A tRNA molecule with the complementary anticodon binds to the codon on the P-site, and carries its corresponding amino acid. Another tRNA with complementary anticodon occupies the A-site, carrying the corresponding amino acid again.

Once both sites are occupied, the tRNA on the P-site transfers its amino acid to the one on the A-site to form a peptide bond. This causes the ribosome to shift the tRNA on the P-site, allowing the one on the A-site to be free. When this happens, the anticodon of the first tRNA on the P-site leaves the ribosome via the E-site in order to bind to another complementary mRNA codon and continue the translation process.

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