After severely breaking his left humerus in an accident, a man lost sensation on the posterior aspect of the limb and was unable to extend his forearm, wrist, or fingers. What nerve was damaged?
A) axillary
B) musculocutaneous
C) radial
D) ulnar
Answer: C) radial
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In bone, osteoblasts serve mainly to dissolve bone and mobilize Ca2+.
Answer the following statement true (T) or false (F)
Preimplantation genetic diagnosis works because
A. each cell in a human at any stage can give rise to a separate individual. B. the missing genes are injected into cell nuclei of the recipient. C. the donor and recipient are siblings and therefore they share most of their genetic material. D. a cell can be removed from an 8-celled human embryo and the remaining 7 cells can continue developing.
A 9-year-old boy was admitted to the emergency department complaining of nausea, vomiting, fever, and loss of appetite. On examination, he was found to have tender- ness and pain on the right lower quadrant. Based on signs and symptoms, the diagnosis of acute appendicitis was made. During an appendectomy performed at McBurney's point, which of the following structures is most likely to be injured?
(A) Deep circumflex femoral artery (B) Inferior epigastric artery (C) Iliohypogastric nerve (D) Genitofemoral nerve (E) Spermatic cord
An increase in white blood cell number at sites of injury, which is characteristic of inflammation, is called ________.
A. chemotaxis B. leukocytosis C. leukemia D. diapedesis