Role of Hemoglobin - Essay Example

Only on StudentShare

Extract of sample
Role of Hemoglobin

A heme group consists of an iron (Fe) ion (charged atom) held in a heterocyclic ring, known as a porphyrin. As seen from the figure the iron ion is the site of oxygen binding, bonds with the four nitrogens in the centre of the ring. The iron is also bound strongly to the globular protein. A sixth position can reversibly bind oxygen, completing the octahedral group of six ligands. Oxygen binds in an "end-on bent" geometry where one oxygen atom binds Fe and the other protrudes at an angle. When oxygen is not bound, a very weakly bonded water molecule fills the site, forming a distorted octahedron.
Oxyhemoglobin is formed during respiration when oxygen binds to the heme component of the protein hemoglobin in red blood cells and occurs in the pulmonary capillaries near the alveoli of the lungs. The oxygen then travels through the blood stream to all the tissues and cells where it is utilized in aerobic glycolysis and in the production of ATP by the process of oxidative phosphorylation. Deoxyhemoglobin is the form of hemoglobin without the bound oxygen (Wikipedia, 2007).
Bicarbonate ions react with the Hydrogen ions that are released from reduced hemoglobin and are in turn converted to water and carbon dioxide. ...Show more

Summary

Hemoglobin is one of the most important content of blood and helps in carrying oxygen to the tissues and carbon dioxide from the tissues to the lungs for expulsion. As the name indicates hemoglobin has two major parts the heme and globin, indicating that each subunit of hemoglobin is a globular protein with an embedded heme group…
Author : idooley
Save Your Time for More Important Things
Let us write a custom essay on your topic
"Role of Hemoglobin"
with a personal 20% discount.
Find out more

Related Essays

Beta thalassaemia major
The thalassaemias belong to a category of these hemoglobinopathies. It refers to an inherited disorder that affects the production of hemoglobin by a decrease in globin chain synthesis and hence causes anemia (Rund D, Rachmilewitz E., 2005).There are two main classifications for the thalassaemias in terms of clinical relevance, i.e the a and the b-thalassaemia.
6 pages (1500 words) Essay
Parents Role
On a less affirmative note, modern stories of parents assailing coaches or officials show the presence of parents in sport. Parents patrol the tangential, shout encouragement from the bleacher, and frequently coach, whether legitimately dispersed the task or not.
9 pages (2250 words) Essay
case study biomedical science
The results indicate there is high level of WBC along with very high Erythrocyte Sedimentation Rate (ESR). Based on the patient history, back pain indicates possibility of multiple myeloma as those are the primary symptoms for the same. Multiple myeloma is one type of blood cancer where uncontrolled growth of plasma cells occurs.
3 pages (750 words) Essay
Challening Role of Nurses
In this paper, it has been seen how important are the Nurses' roles in effecting health and physical assessment of the patients towards positive health care deliveries. By a detailed discussion of two cases of hospitalisation due to chest pain and COPD, how nurses make health care assessment of the patients as a prelude to the visit of medical staff and, more importantly for giving emergency treatment on admission till the medical staff arrive is demonstrated.
11 pages (2750 words) Essay
Iron Deficiency Anemia
Under the condition of severe anemia, iron injections are preferred choice so that the supply of the iron can be fulfilled at faster pace to make healthy red blood cells. Low iron levels usually are due to blood loss, poor diet, or an inability to absorb enough iron from food.
6 pages (1500 words) Essay
Haemoglobin plays a role in the transport of oxygen and carbon dioxide. Describe how this is accomplished at the molecular level. What happens to the relations
Each heme group contains an iron atom which is responsible for the binding of oxygen and each heme group is able to bind one oxygen molecule, and therefore one hemoglobin molecule can bind four oxygen molecules in humans. In
4 pages (1000 words) Essay
Find out how much would it cost
to get a custom paper written by a pro under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
YOUR PRIZE:
Apply my DISCOUNT