Hematological System Development Quiz

What happens around 14 days of gestation in the development of the hematological system?

• RBC can be seen arising from embryonic connective tissues

• Hemoglobin synthesis begins

• Liver hematopoiesis starts

• Primitive erythroblasts are detectable in circulating blood

Which of the following are functions of red blood cells (RBC)?

• Carbon dioxide transport

• Buffering of protons

• Oxygen transport

• Fighting infections

What changes occur in the hematological system between weeks 36 to 38 of gestation?

• Transition from fetal to adult hemoglobin production

• WBC count becomes equal to that of term infants

• Liver hematopoiesis peaks

• RBC contain 70% - 90% HbF at birth

How long do red blood cells (RBC) typically live in different stages of development?

• Term infants: 60 to 70 days

• All infants: 90 to 100 days

• Preterm infants: 35 to 50 days

• Adults: 100 to 120 days

Which of the following events occur during embryonic hematopoiesis?

• RBC arising from embryonic connective tissues

• Production of adult hemoglobin dominates

• Hemoglobin synthesis begins

• Liver hematopoiesis peaks

Which processes are involved in the function of red blood cells?

• Oxygen transport via oxyhemoglobin

• Carbon dioxide transport via carboxyhemoglobin

• Buffering of protons via binding with hemoglobin

• Production of white blood cells

What changes occur in hematopoiesis during late gestation?

• Transition from fetal to adult hemoglobin production

• Liver hematopoiesis peaks

• Medullary bone marrow becomes the primary site of hematopoiesis

• RBC count increases to adult levels

How does the lifespan of red blood cells differ between adults and newborns?

• All RBCs have the same lifespan regardless of age

• Term infant RBCs live for 60 to 70 days

• Preterm infant RBCs live for 35 to 50 days

• Adult RBCs live for 100 to 120 days

Which processes occur during the development of the hematological system in the embryo?

• Transition from HbF to HbA production occurs at 36-38 weeks

• RBC production from embryonic connective tissues begins at 14 days of gestation

• Liver hematopoiesis peaks at 22 weeks of gestation

• Primitive erythroblasts are detectable in circulating blood at 21-35 days of gestation

Which factors can delay the transition from fetal hemoglobin (HbF) to adult hemoglobin (HbA) production?

• Fetal growth restriction

• Maternal hypertension

• Infants of diabetic mothers

• Maternal hypoxia