Vomiting Reflex Essay Example | Topics and Well Written Essays - 250 words

Vomiting Reflex - Essay Example This means that it can receive direct emetogenic stimulation from the cerebrospinal fluid and blood. The CTZ sends impulses to the vomiting impulses to the vomiting centre. The process of vomiting includes the retching and the expulsive phase. In the retching phase, the vomiting centre transmits motor efferent impulses to the abdominal muscles and the diaphragm resulting in increased intra-abdominal pressure. It also results in anti-peristalsis forces that can go all the way to the duodenum and ileum. Gastric content accumulates in the stomach resulting in relaxation of the lower esophageal sphincter (John, 2010). This is accompanied by hypersalivation, increased heart rate and sweating through the parasympathetic outflow. The hyoid bone and the larynx are elevated so as to open the upper esophageal sphincter. This is followed by the closure of the glottis. The increased intra-abdominal pressure and anti-peristalsis forces results in the expulsion of the abdominal contents. The following is a flow chart demonstrating the vomiting reflex. The contents and color of the vomitus may be used to diagnosis the cause of vomiting. Bleeding from the esophagus is showed by the presence of fresh blood in the vomitus. When the blood originates from the stomach, for example, perforated peptic ulcer, the vomitus has coffee ground appearance. This is because the acid found in the stomach reacts with the iron found in hemoglobin. Presence of bile in the vomitus indicates that the pyloric valve is open. This means that there is massive contraction of the duodenum leading to expulsion of bile (John, 2010). Fecal content in the vomitus indicates a gastrocolic fistula or intestinal obstruction. In case of intestinal obstruction, the vomiting relieves the associated abdominal pain and distension. These features are used to determine the origin of pathology in the gastrointestinal

MPH502 - Introduction to Public Health Module 4 - Case Essay

MPH502 - Introduction to Public Health Module 4 - Case - Essay Example Health indicators involve a careful analysis of mortality and morbidity rates of various groups (ethnic, racial or others), their life expectancy, standards of life, birth rates, records of prevalence of specific diseases, information about the access of a particular group to medical and health facilities, financial backgrounds of groups, educational standards and so on. The health disparities that exist between various groups are mainly the result of genetic variations, environmental factors and specific health behaviors. These are the most influential and useful indicators of health disparities that prevail in the ethnic and racial groups in the US. The causes of these differences also involve the lack of healthcare facilities available to a particular group, discrimination on the basis of gender, race, financial and social grounds etc. inadequate knowledge and educations, environmental differences and other reasons of this type. The diverse population of the United States requires careful attention to be managed properly when it comes to such delicate matters as health and life. In order to improve the health conditions, it is important to eliminate the health disparities that exist. Some ways are to utilize the information of death rates of groups and improve policies in order to eliminate the factors that are causing deaths in that particular group. Moreover, the accessibility to healthcare facilities must be available to all groups regardless of their racial, religious and cultural differences. Education is a must to improve the long term conditions of health for such a diverse population. Hence, educational facilities and their availability with proper guidance to the parents and students is also a factor to consider. There are certain environmental factors which are leading to adverse health outcomes in certain racial and ethnic groups. These environmental issues (both physical and social) are difficul t to be handled