The roof of the orbit is formed by the
A. maxillary and zygomatic bones.
B. ethmoid and lacrimal bones.
C. zygomatic and sphenoid bones.
D. frontal bone.
Answer: D
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________ regulates the growth and maturation of megakaryocytes.
A) Interleukin B) Erythropoietin C) Colony-stimulating factor D) Thrombopoietin E) None of the answers are correct.
What blood cell type is activated in response to a damaged blood vessel?
A) neutrophils B) monocytes C) basophils D) lymphocytes E) None of the answers are correct.
When acetylcholine binds to receptors at the motor end plate, the end plate membrane becomes
A) more permeable to sodium ions. B) less permeable to sodium ions. C) more permeable to calcium ions. D) less permeable to potassium ions. E) repolarized.
Bean-shaped lymphatic organs found along lymphatic vessels are called
A. lymph nodes. B. medullary cords. C. cisterna chyli. D. trabeculae. E. lymph nodules.