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Agata [3.3K]
2 years ago
9

The first sphincter encountered in the alimentary canal is the: The first sphincter encountered in the alimentary canal is the:

pyloric sphincter. ileocecal sphincter. gastroesophageal sphincter. upper esophageal sphincter.
Biology
1 answer:
Arte-miy333 [17]2 years ago
4 0

Answer:

The correct answer is: upper esophageal sphincter.

Explanation:

The alimentary canal is a very long tract responsible for the digestion of the food. It is composed of several organs with many different and important functions. The alimentary canal also has a few sphincters, which are muscular valves that open and close when needed for the food to pass or be retained.

The first sphincter is the upper esophageal sphincter. One particularity of this sphincter is that is one of the few sphincters in the body that opens and closes under our conscious control, which happens when we decide to swallow our food.

From the first to the last, the order of the sphincters in the gastrointestinal tract is: upper esophageal sphincter, lower esophageal sphincter or gastroesophageal sphincter, pyloric sphincter, ileocecal sphincter, and anus.

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D)Decreased number of fish species who use the estuaries. 

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Molecule x moves across a cell membrane by diffusion. which row in the chart below best indicates the relationship between the r
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Fruit flies have a diploid number of 8, and honeybees have a diploid number of 32. In which case will crossing over have greater
Yanka [14]

Answer:

            The correct option is A.

Explanation:

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                    Drosophila melanogaster is a common fruit fly having diploid number of 8 chromosome composed of 122,653,977 base pairs, and about ~17,000 genes.  Honey bees have diploid number of 32 chromosomes composed of approximately 2360000 base pairs, and 10,000 genes.    

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2 years ago
If the cell reference $a5 in a formula is copied and pasted over two columns and down two rows from its original cell, what the
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If cell reference $A5 in a formula is copied and pasted over two columns and down two rows from its original cell, the cell reference in the new cell becomes $A7. 

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