Failure of the palatine processes of the maxilla to fuse properly during development results in a
A. cleft chin.
B. deviated septum.
C. cleft lip.
D. cleft palate.
E. clogged sinus.
D
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The sensor-receptive cells in the retina that function best in dim light and enable night vision are the ________
A) Rods B) Pupil C) Iris D) Cones
The figure illustrates the layers of the epidermis. Which layer of the epidermis is "B"?
A. Stratum spinosum B. Stratum lucidum C. Stratum granulosum D. Stratum basale E. Stratum corneum
Which of the following is the first step in the sliding mechanism of muscle contraction?
A) A carbohydrate molecule is broken down to produce energy. B) Thin filaments are pulled toward the center of the sarcomere. C) The cross-bridges detach and return to their original positions. D) The myosin heads of the thick filaments bind to active sites on the thin filaments. E) Myosin heads pivot toward the M line when cross-bridge binding occurs.
After childbirth, a woman begins experiencing tremendous pain in her groin, making it difficult for her to walk. An X-ray shows a fracture extending from her symphysis pubis to the inferior ramus of the pubis. As a result of the fracture, which group of muscles might be impaired?
A. Thigh adductors B. Lateral rotators C. Thigh abductors D. Hip extensors E. Hip flexors