1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Y_Kistochka [10]
3 years ago
9

What part of the intestinal tract prevents backflow of food from the stomach into the esophagus? a. diaphragm b. lower esophagea

l sphincter c. pyloric sphincter d. upper esophageal sphincter e. pharynx
Biology
2 answers:
Ganezh [65]3 years ago
7 0

Answer:

The answer is option b. lower esophageal sphincter.

Explanation:

As food enters the oropharynx swallowing reflex is initiated to bring about peristalsis (a wave-like motion), that conveys the food through the esophagus to the stomach. The esophagus is a tubular structure between the oral cavity and stomach. It has two sphincters that prevent retrograde movement of food. This includes the upper esophageal and lower esophageal sphincters.

The upper esophageal sphincter guards the entrance of the esophagus and is situated at the inferior end of the pharynx. This usually relaxes to allow food passage into the esophagus.

The lower esophageal sphincter also referred to as the cardiac sphincter is located at the lower end of the esophagus, just at the junction between the esophagus and the stomach. This allows passage of food into the stomach and prevents back flow of food and acid secretions into the the esophagus.

lara31 [8.8K]3 years ago
4 0

Answer:

The correct option is b. lower esophageal sphincter

Explanation:

The esophagus is the initial part of the digestive tract and its function is the transport of the alimentary bolus from the pharynx to the stomach, through the thorax and avoid the reflux thereof. It begins and ends in two sphincter structures, the upper esophageal sphincter and the lower esophageal sphincter, which separate it from the pharynx and stomach. The lower esophageal sphincter has two functions: relax during swallowing and prevent reflux of the gastric contents into the esophagus in the postdeglutory period. After swallowing, there is a relaxation of the lower esophageal sphincter, pressure dropping to levels similar to those of the gastric fundus, which allows the bolus to enter the stomach. This relaxation lasts a few seconds and is followed by a strong contraction that prevents backflow of food.

You might be interested in
Answer please thank you!
xxTIMURxx [149]

Answer:

7. 4

8. 2

9. 3

Explanation:

Just a guess, please double check :)

Hope this helped

4 0
3 years ago
Classify each label into the correct side in the diagram below
makkiz [27]

Answer: sorry i dont know the answer sorry for that

Explanation:

6 0
2 years ago
As matter and energy move from grasses to coyotes the amount of available energy...
Vitek1552 [10]
The answer to your question is C
8 0
3 years ago
Read 2 more answers
What is The gap between two neurons is called <br>​
djverab [1.8K]

Answer:

A synapse.

Explanation:

This is where signals are transmitted through the brain, but cannot connect two neurons. The space is called a synapse.

4 0
3 years ago
Help this is due tomorrow
Zinaida [17]

Answer:

chicken wit a bagel

Explanation:

you see the chicken got a bagel

8 0
2 years ago
Read 2 more answers
Other questions:
  • What are the similarities between an open and closed system? I will give Brainliest or whatever its called!
    11·1 answer
  • "the valves located between the atria and ventricles are known as the ________ valves."
    6·1 answer
  • Bill once had a blue car that was in the shop more than it was on the road. Since
    14·1 answer
  • Which of the following processes takes place during prophase?
    10·1 answer
  • 1. In architecture, how have termite mounds inspired and improved building designs?​
    14·1 answer
  • How can an increase in biodiversity lead to an increase in ecosystem stability?
    7·2 answers
  • What is the process of Asexual and Sexual reproduction of Jellyfish?<br> Plz give BOTH answers!!
    11·1 answer
  • Describe how proteins can speed up chemical reactions and how they can help transport oxygen throughout the body.
    13·1 answer
  • What scientist concluded that all animals aremade of cells
    10·1 answer
  • PLEASE ANWSER CORRECT AND ASAPPL
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!