Atherosclerosis is the
A. hypertrophy of the tunica intima.
B. stretching of arterial walls.
C. inflammation of veins.
D. deposition of plaques in arterial walls.
D
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The opening in the iris through which light passes is the
A) conjunctiva. B) cornea. C) pupil. D) anterior chamber. E) posterior chamber.
Which embryonic structure gives rise to the collecting ducts?
A. Metanephric kidney tissue B. Pronephros C. Metanephros D. Mesonephric duct E. Embryonic cloaca
What is the importance of the secondary curves of the spine?
A) The secondary curves allow us to balance our body weight to permit an upright posture. B) The secondary curves surround the lungs and expand allowing us to breathe. C) The secondary curves accommodate the thoracic organs. D) The secondary curves accommodates the abdominopelvic organs. E) The secondary curves enclose the spinal cord.
Which heart chamber lacks a group of pacemaker cells?
A) Left atrium B) Right atrium C) Left ventricle D) Right ventricle