Blood platelets…
A. Are formed in the bone marrow.
B. Are normally more numerous than white cells.
C. Have a small single-lobed nucleus.
D. Increase in number after injury and surgery.
E. Alter shape when in contact with collagen.
The correct answers are:
A. Are formed in the bone marrow.
B. Are normally more numerous than white cells.
E. Alter shape when in contact with collagen.
Blood platelets are indeed formed in the bone marrow, are usually more numerous than white blood cells, and change shape upon contact with collagen to aid in clotting. They do not have a nucleus, and while their number can increase in response to certain conditions, this is not a universal response to all injuries and surgeries.