What is the name of the common stem cell from which all blood cells are derived?
A. megakaryocytes
B. hempocytoblast
C. lymphoid cells
D. myeloid cells
Select your answer:

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Respiratory, Cardiovascular & Oncology Bacteria, Viruses, Protozoa Fungi Skeleton Human Body Muscle Anatomy Understanding Psychology Nervous System The Nervous System DNA Structure, Replication, Proteins Fluid and Electrolytes Anatomy Bones Muscle Tissue Blood Pressure Child Growth and Development Circulatory and Respiratory System Shelter MedicineOther quiz:
Proteins › ViewProtein needs also increase for people who:
A. have injuries
B. have undergone surgery
C. consistently break down muscle during exercise
D. All the above
Immunology IBD › View
What was the main objective of the IM-UNITI maintenance study?
A. To investigate the efficacy and safety of Ustekinumab 90 mg q8w or q12w versus placebo over a 44-week period
B. To investigate the efficacy and safety of Ustekinumab 130 mg q5w or q10w versus placebo over a 44-week period
C. To investigate the efficacy and safety of Ustekinumab 80 mg q12w versus adalimumab or placebo over a 44-week period
D. To investigate the efficacy and safety of Ustekinumab ~6 mg/kg or 130 mg versus placebo over a 48-week period