A cytokine that encourages the production of red blood cells is called ____________________. It is made by cells in the ______________________.

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Erythropoietin is a cytokine that stimulates the bone marrow to produce blood cells. It is manufactured by cells in the kidneys. Patients with kidney failure do not produce adequate amounts of erythropoietin. Surfactant is a fluid made in the lung. It reduces the surface tension of alveoli, allowing them to open for efficient gas exchange.

A Cytokine That Encourages the Production of Red Blood Cells