There are many theories which try to explain the mechanism of auto-regulation of blood flow. They are: 1. Myogenic theory 2. Tissue metabolite theory 3. Tissue fluid pressure theory 4. Renin-angiotensin theory, etc. (this theory is applicable only in kidneys) 1. Myogenic Theory (Fig. 3.53) According to This Theory: i. When there is an increase in pressure, initially there will [...]
In this article we will discuss about:- 1. Types of Shock 2. Signs and Symptoms of Shock 3. Stages 4. Events Occurs in Irreversible Stages 5. Treatment. Shock is defined as lack of tissue perfusion which occurs when there is an imbalance between the volume of blood present in the circulatory system and the capacity of the circulatory system itself. [...]
The following points highlight the three important stages of swallowing. The stages are: 1. Buccal or Oral Stage 2. Pharyngeal Stage 3. Esophageal Stage. 1. Buccal or Oral Stage: By the action of tongue, and muscles contracting against the palate, the food is converted into bolus which is lubricated by saliva. The bolus is then pushed by the tongue to [...]