Question

Red cell count is carried out by
A.Haemocytometer
B.Haemoglobinometer
C.Sphygmomanometer
D.Electrocardiogram

Answer 1

Hint: Red cell refers to red blood cells also known as erythrocytes which carries oxygen to the body from the lungs. An increase or decrease of red blood cell count from the normal count can lead to various disorders.

Complete answer:
A healthy person has 5-5.5 million Red blood cells per mm3 of blood which have a lifespan of 120 days after which the spleen destroys those RBC's which have completed their life span.
Red blood cells are formed in the bone marrow and they do not contain a nucleus and are concave in shape from both sides hence known as biconcave and it contains one of the most important proteins that is known as hemoglobin.

Option A: Haemocytometer is a device that is used for counting red blood cells, it contains different grids and has specific area and volume to count the number of red blood cells in a particular volume of blood. Therefore, this is the correct option.

Option B: Hemoglobinometer is a device used for measuring the hemoglobin concentration of the blood. Therefore, this is the incorrect option.

Option C: A sphygmomanometer is an instrument used to determine blood pressure and it can measure both systolic and diastolic blood pressure. Therefore, this is the incorrect option.

Option D: Electrocardiogram is a device that checks the heart conditions by recording the electrical signals of the heart. Therefore, this is the incorrect option.

Hence, the correct answer is option (A)

Note: It is very important to maintain a normal count of red blood cells because a decrease in red blood cells causes anemia and weakness and the increase in red blood cells also known as polycythemia can make the blood thick due to which it can clot easily even inside the blood vessels which can lead to circulatory disorders.
The hemocytometer was discovered by Louis Charles malassez