Degeneration of spinal motor neurons in adults may be due to a lack of ________ factor.
A. glial-derived neurotrophic (GDNF)
B. nerve growth (NGF)
C. neurotrophin-3
D. brain-derived neurotrophic (BDNF)
Answer: A
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The brachiocephalic vein receives blood from the
A) subclavian vein. B) external jugular vein. C) vertebral vein. D) internal jugular vein. E) All of the answers are correct.
Shannon was the pitcher on her softball team. During one game, a batter hit the ball and it ricocheted off the left side of Shannon's head, knocking her temporarily unconscious. She eventually regained consciousness, but experienced severe pain near her left temple. Within a few hours, Shannon had trouble moving her right upper limb and became lethargic. Her team captain brought her to the emergency room, where the physician diagnosed her with an epidural hematoma. An epidural hematoma causes an accumulation of blood to develop between what two structures?
a. the skull and the periosteal layer of the dura mater b. the periosteal and meningeal layers of the dura mater c. the meningeal layer of the dura mater and the arachnoid mater d. the arachnoid mater and the pia mater
Where do T-lymphocytes mature?
A. Tonsils B. Spleen C. Thymus gland D. White bone marrow E. Thyroid gland
What does the term "depressor" refer to in the name depressor labii inferioris?
a) the location of the muscle b) the shape of the muscle c) the length of the muscle d) the action of the muscle