I n hill region % on oxygen in air decreases , and carbon di oxide increases in blood. This stimulates the pneumotaxic centre of brain which helps in secreting erythropoenin in kidney. Erythropoenin hepls in synthesis of RBC from bone marrow.
Leukemia is an increase in the number of abnormal white blood cells in the bloodstream. These abnormal cells do not function properly and can crowd out normal white blood cells, leading to a weakened immune system.
polycythemia
polycythemia
Polycythemia
Only the white blood cell count increases - they're the cells that fight infection.
The number of white blood cells increase during an infection, so they can fight off the pathogens quicker.
The number of RBC will increase
White blood cells (leukocytes)
Increasing the number of blood cells can lead to increased blood viscosity, which may slow down blood flow. This can potentially affect the delivery of oxygen and nutrients to tissues and create a risk for blood clots.
The percentage goes up. (Hematocrit is the percentage of red blood cells in a sample of whole blood, so if an elevated number of red blood cells is produced by your bone marrow, your hematocrit level should rise).
White blood cells increase in number to fight an infection or 'disease'. It is part of the body's immune response.
There are normally between 4×10 and 1.1×10 white blood cells in a liter of blood, and ranging from 7 and 21 microns in diameter, they make up approximately 1% of blood in a healthy adult. An increase in the number of leukocytes over the upper limits is called leukocytosis, and a decrease below the lower limit is called leukopenia.