The metatarsophalangeal joints allow movement in two planes and are classified as ________ joints.
A. condylar
B. hinge
C. pivot
D. ball and socket
E. planar
Answer: A
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In the blastocyst, the inner cell mass develops into which of the following parts?
a. Ectoderm b. Mesoderm c. Endoderm d. Epidermis e. Dermis
Excessive production of free radicals that can damage lipids, proteins, and DNA is called ________.
A. inflammation B. quenching C. oxidative stress D. antioxidation
Which of the following statements concerning oogenesis is false?
A) Oogenesis begins before birth. B) Ova develop from stem cells called oogonia. C) An ovum completes meiosis II after it is fertilized. D) About half the oogonia complete mitosis between birth and puberty. E) By the time of their birth, girls have already lost about 80 percent of their oocytes.
Veins
A. carry blood away from the heart. B. carry blood under very high pressure. C. may contain valves and are lined with endothelium. D. are described as strong, rigid vessels that always carry oxygenated blood. E. have thick, many layered walls.