What is the role of reticular cells in the bone marrow?
A. They give rise to all formed elements of the blood.
B. They destroy malformed blood cells.
C. They produce thymosin.
D. They secrete colony-stimulating factors.
E. They produce antibodies.
D. They secrete colony-stimulating factors.
You might also like to view...
Which are the smallest components of the cytoskeleton?
A. Microfilaments B. Microtubules C. Centrioles D. Centrosomes E. Intermediate filaments
Which of the following answer choices includes organelles that are surrounded by a double membrane?
A) nucleus, lysosome B) nucleus, mitochondria C) nucleus, peroxisome D) peroxisome, lysosome
Stretch reflexes:
A. occur only in the legs. B. inhibit antagonistic muscles. C. mediate flexor activation and withdrawal from a painful stimulus. D. are initiated by stimulation of Golgi tendon organs. E. are initiated by stretching of extrafusal muscle fibers.
Which of the following drugs, administered as an aerosol spray, would be most likely to help an infant with respiratory distress syndrome of the newborn?
A. pulmonary surfactant B. a beta-adrenergic agonist C. a muscarinic agonist D. histamine E. a beta-adrenergic antagonist