The primary humoral factor regulating the erythropoiesis is ___. ()
Androgen
B. Estrogen
C. the extract of the red cells
D. thyroid hormone
E. erythropoietin
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The initiator of extrinsic blood coagulation is___. ()
A. Fibrinogen
B. Serum
C. Plasma
D. Ⅻa
E. Ⅲ
When both anti-A and anti-B agglutinins are present in the plasma, the blood will be ___. ()
A. group A
B. group B
C. group O
D. group AB
E. group B or group AB
Which is not protein in the following blood coagulation factors? ()
A. factor I
B. factor II
C. factor III
D. factor IV
E. factor X
___ of the systemic circulation is similar to that of the pulmonary circulation. ()
A. The systolic pressure
B. The diastolic pressure
C. The pulse pressure
D. The peripheral resistance
E. The cardiac output