Mrs. Ryan, a middle-aged woman, appears at the clinic complaining of multiple small hemorrhagic spots in
her skin and severe nosebleeds. While taking her history, the nurse notes that Mrs. Ryan is taking Apronal (a
sleeping medication) because she has problems getting to sleep at night. This drug is known to be toxic to
red marrow. Using your knowledge of physiology, explain the connection between the bleeding problems
and the taking of Apronal.