RSSCategory: Physiology

Complications of blood transfusions

Complications of blood transfusions

Complications of blood transfusions General problems of all blood transfusions include the following: ● Acute haemolytic reaction ● Delayed haemolytic transfusion reaction ● Febrile non-haemolytic transfusion reaction ● Transfusion-associated infections ● Increasing costs ● Anaphylaxis ● Immunomodulatory effects ● Iron overload ● Fluid overload. Acute haemolytic reaction When incompatible RBCs are transfused, they can react […]

November 14, 2012 | By | Reply More
Mechanism of Haemostasis (Coagulation)

Mechanism of Haemostasis (Coagulation)

Mechanism of Haemostasis (Coagulation) Haemostasis is a complex and dynamic physiological process that aims to stop bleeding within the body. The discontinuation of bleeding depends on the interaction of endothelial cells, platelets and coagulation factors. Anticoagulation factors and the fibrinolytic system oppose coagulation and remove clots. Platelet plug formation The initial response of a vessel […]

November 14, 2012 | By | Reply More
Respiration and Respiratory Diaphragm

Respiration and Respiratory Diaphragm

Respiration and Respiratory Diaphragm Respiration Serous fluid adhesion between visceral and parietal pleura links volume of lungs with movements of diaphragm and thoracic wall and facilitates respiration Inspiration increases volume of thoracic cavity and lungs to create a negative intrathoracic pressurethat draws air into lungs Quiet inspiration Involves contraction of diaphragm, pulling it downward to […]

October 20, 2012 | By | Reply More
Conducting System of the Heart

Conducting System of the Heart

Conducting System of the Heart Conducting System of the Heart is composed of modified, specialized cardiac muscle cells that lie immediately beneath the endocardium and carry impulses throughout the cardiac muscle, signaling the heart chambers to contract in the proper sequence. 1. Sinoatrial Node Is a small mass of specialized cardiac muscle fibers that lies in […]

October 11, 2012 | By | Reply More
Ovarian Cycle Phases and Ovulation

Ovarian Cycle Phases and Ovulation

Ovarian Cycle Phases and Ovulation   The ovarian cycle is a series of events in the ovaries that occur during and after the maturation of the oocyte (egg or ovum). During their reproductive years, nonpregnant females usually experience a cyclical sequence of changes in their ovaries and uterus. Each cycle takes about one month and […]

August 25, 2012 | By | Reply More
Menstrual Cycle / Uterine cycle (phases and hormonal control)

Menstrual Cycle / Uterine cycle (phases and hormonal control)

Menstrual Cycle / Uterine cycle (phases and hormonal control) Uterine (Endometrial) Cycle Monthly cyclical changes in the endometrium of uterus for prepration of implantation (in the event of fertilization) and for menstruation (in the absence of fertilization) is called uterine cycle. The uterine (menstrual) cycle is a concurrent series of changes in the endometrium of […]

August 25, 2012 | By | Reply More
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