Fertilization usually occurs in the ________.
A. ovary
B. vagina
C. uterine tube
D. uterus
Answer: C
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A hormone released by the kidneys that stimulates the absorption of calcium ions from the digestive tract is ____.
Fill in the blank(s) with the appropriate word(s).
A duplicated chromosome is held together at its central region called its
A. centriole. B. centromere. C. histone. D. centrosome.
Tina falls while climbing a tree and lands on her back. Her frightened parents take her to the emergency room, where she is examined. Her knee-jerk reflex is normal and she exhibits a plantar reflex (negative Babinski reflex). These results suggest that
A) Tina has injured one of her descending nerve tracts. B) Tina has injured one of her ascending nerve tracts. C) Tina has a spinal injury in the lumbar region. D) Tina has a spinal injury in the cervical region. E) Tina suffered no damage to her spinal cord.
Mark was tackled in a football game and sustained an injury to his antebrachial region; where is his injury located?
-hip -forearm -wrist -leg