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.
<span>The term used when a mother makes the decision to terminate a pregnancy is abortion. This term means that the pregnancy will come to an end via removing the embryo or fetus prior to any time that it is capable of surviving on its own outside of the uterus.</span>
During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes. Chromosomes are made of a single piece of DNA that is highly organized.
<span>1. Reorient frequently to time, place, and situation.
2. Put the client in a quiet room furthest from the nursing station.
3.perform necessary producers quickly
4.Arrange for familiar pictures or special items at bedside.
5.Limit the client visitor's.
6.spend time with clients ,establishing a trusting.</span>
Answer:
approximately 4.5 billion years ago
Explanation:
