Indicate true (T) and false (F) statements below regarding erythropoiesis. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTF.
( ) Oxygen stimulates the secretion of erythropoietin.
( ) Each human erythrocyte lives for a few days on average.
( ) All erythrocytes express "DON'T EAT ME" signals on their surface to prevent phagocytosis.
( ) It only takes 1 to 2 days for erythrocyte numbers to rise following stimulation with erythropoietin.

Question

Indicate true (T) and false (F) statements below regarding erythropoiesis. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTF.
( )	Oxygen stimulates the secretion of erythropoietin.
( )	Each human erythrocyte lives for a few days on average.
( )	All erythrocytes express "DON'T EAT ME" signals on their surface to prevent phagocytosis.
( )	It only takes 1 to 2 days for erythrocyte numbers to rise following stimulation with erythropoietin.

Quizplus · Accepted Answer

A lack of oxygen can stimulate specialized cells in the kidneys to secrete erythropoietin. Shortly afterward, the rate of release of new erythrocytes is increased, suggesting that late precursors are affected by the hormone. Each human erythrocyte lives for about 120 days. Only younger ones express signals to avoid being eaten by macrophages.

Indicate True (T) and False (F) Statements Below Regarding Erythropoiesis