chp 18 review questions

Prothrombin is converted to thrombin during the ________.

common pathway

The production of healthy erythrocytes depends upon the availability of ________.

copper, zinc, and vitamin B12

Which of the following statements about blood is true?

Blood is slightly more viscous than water.

Hemolytic disease of the newborn is a risk during a subsequent pregnancy in which ________.

an Rh− mother is carrying a second Rh+ fetus

T and B lymphocytes ________.

are involved with specific immune function

Hemophilia is characterized by ________.

inadequate production of clotting factors

Aging and damaged erythrocytes are removed from the circulation by ________.

macrophages

Which of the formed elements arise from myeloid stem cells?

platelets

Which of the following statements about mature, circulating erythrocytes is true?

they have no nucleus

The first step in hemostasis is ________.

vascular spasm