18 Questions
What is the diameter of a red blood cell?
7.8 µm
What is the normal range of red blood cell count in adult males?
4.6-6.2 millions/µl
What creates the unique shape of red blood cells?
Cytoskeleton
What is the thickness of a red blood cell at the thickest point?
2.5 µm
What is the volume of a red blood cell?
90 to 95 µm2
In which gender is the normal range of red blood cell count 4.2-5.4 millions/µl?
Adult females
Which organelles are present in reticulocytes?
Golgi apparatus and mitochondria
What stimulates the production of proerythroblasts from hematopoietic stem cells in the bone marrow?
Erythropoietin (EPO)
What is the primary function of red blood cells?
Facilitate oxygen and carbon dioxide transport
What vitamin is especially important for the maturation and rate of production of erythropoietic cells in the bone marrow?
Vitamin B12
What does a lack of vitamin B12 or folic acid cause in the erythroblastic cells of the bone marrow?
Formation of larger than normal RBCs
What is the iron-containing component that can combine reversibly with oxygen in a hemoglobin molecule?
Heme group
Which form of carbon dioxide transport accounts for approximately 70% of total CO2 transport?
As bicarbonate ion
What ratio can be used to monitor long term fluctuations of blood glucose levels?
$HbA1C$ ratio
Which isoform of globin proteins is present in adult hemoglobin (hemoglobin A)?
$\alpha_2\beta_2$ chains
Which region does carbonic anhydrase mainly target for the hydration of CO2?
The red blood cells
What is the main component that accounts for over 98% of oxygen binding in red blood cells?
Heme group
What is measured to calculate the oxy/deoxyhemoglobin ratio in pulse oximetry?
Absorption of red and infrared light
Test your knowledge on the structure and functions of red blood cells. Learn about the regulation of erythropoiesis and the importance of vitamin B12, folic acid, and iron for RBC production. Understand the features of RBCs such as their life span, count, shape, and hemoglobin concentrations, as well as the meaning of MCV, microcytosis, macrocytosis, MCH, and MCHC.
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