MCQ
Q.
In which part of our body RBC formed?
Correct Answer: C
The correct answer is Bone-marrow.
Key Points
Red blood cell:
- Red blood cells (RBCs) are the most common type of blood cell and the vertebrate's principal means of delivering oxygen to the body tissues via blood flow through the circulatory system.
- RBC is formed in Bone Marrow.
- RBCs take up oxygen in the lungs, or in fish the gills, and release it into tissues while squeezing through the body's capillaries.
- The cytoplasm of erythrocytes is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells and the blood.
- Each human red blood cell contains approximately 270 million of these hemoglobin molecules.
- The cell membrane is composed of proteins and lipids, and this structure provides properties essential for physiological cell function such as deformability and stability while traversing the circulatory system and specifically the capillary network.
Additional Information
- Red blood cells are thus much more common than the other blood particles: there are about 4,000–11,000 white blood cells and about 150,000 - 400,000 platelets per microliter.
- Human red blood cells take on average 60 seconds to complete one cycle of circulation.
- The blood's red color is due to the spectral properties of the hemic iron ions in hemoglobin.
- Each hemoglobin molecule carries four heme groups; hemoglobin constitutes about a third of the total cell volume.
- The normal pH range of blood is between 7.35 to 7.45. This means that blood is naturally slightly alkaline or basic.
