What is the most likely reason humans have only two nipples?
A. Our primate ancestors probably had litters.
B. The number of nipples was reduced in humans due to sexual selection.
C. Primates generally have only one offspring.
D. Most mammals have only two nipples.
E. Having two nipples is associated with upright walking (bipedality).
Answer: C
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Which of the following is not true of the pubis?
A. It encircles part of the obturator foramen. B. It forms part of the greater sciatic notch. C. It has a superior ramus. D. It forms part of the acetabulum. E. It forms the anterior inferior part of the pelvis.
After a day or two of suffering from a viral infection, you notice an area of swelling and pressure under your ribs on the left side, near the stomach and under the lungs. The enlarged organ must be the ________.
Fill in the blank(s) with the appropriate word(s).
What region does the superior cervical ganglion primarily serve?
a) Abdominal b) Pelvic c) Skin d) Head e) None of these choices
A specialized cell that monitors conditions either inside the body or in the external environment is a sensory ________.
Fill in the blank(s) with the appropriate word(s).