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Slav-nsk [51]
3 years ago
8

What is the muscular valve between the esophagus and the stomach

Biology
1 answer:
Sergio [31]3 years ago
7 0

Answer:

The lower esophageal sphincter, or gastroesophageal sphincter

Explanation:

The esophagus is a structure, part of the alimentary canal (gastrointestinal tract) that connects the pharynx to the stomach and through which the food passes. The esophagus is a fibromuscular tube that is involved in the food transport via peristaltic contractions (radially symmetric muscle contractions and relaxation).

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Heterozygous: (X,Y)

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3 years ago
Infections most commonly associated with congenital hearing loss are
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3 years ago
incorporation of a novel cd4 helper epitope identified from aquifex aeolicus enhances humoral responses induced by dna and prote
Gnom [1K]

The incorporation of a CD4+ Helper Epitope from Aquifex aeolicus enhances vaccine-induced humoral immunity by recognizing certain components of the immune system.

<h3>What are CD4+ Helper cells?</h3>

CD4+ Helper cells are CD4-positive cells of the immune system that trigger the body's responses to infections. These cells recognize epitopes (i.e., molecular domains) present in certain cells in order to trigger the humoral or cellular responses.

In conclusion, the incorporation of a CD4+ Helper Epitope from Aquifex aeolicus enhances vaccine-induced humoral immunity by recognizing certain components of the immune system.

Learn more about CD4+ Helper cells here:

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6 0
2 years ago
Which statement regarding the Polymerase Chain Reaction (PCR) is TRUE? Group of answer choices The primers that are used to star
viktelen [127]

Answer:

The amount of target DNA segments doubles with each cycle of PCR.

Explanation:

A polymerase chain reaction is an in vitro technique that is performed in the labs to replicate the DNA from a very small amount of DNA sample. The DNA sample is replicated or double in a very small amount of time that is the target sample doubles after each cycle.

The PCR technique is based on the DNA replication mechanism and thus employs the primer, A Taq DNA polymerase enzyme and the adequate amount of temperature.

Thus, the selected option is correct.

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3 years ago
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