Which of the following is not true regarding rheumatoid arthritis?
A. The articular cartilage degenerates.
B. The synovial membrane thickens.
C. It affects 85% of people older than 70.
D. It is associated with rheumatoid factor (an autoantibody).
E. It may lead to ankylosis.
Answer: C
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The tough structure that surrounds the heart and helps reinforce and maintain position of the heart is the
A) mediastinum. B) epicardium. C) pericardial sac. D) pleural cavity. E) aorta.
Which of the following would make the oxygen-hemoglobin curve shift right?
A) increased pH B) increased H+ concentration C) decreased temperature D) decreased CO2 E) None of the answers are correct.
The difference between the vestibular folds and the vocal folds is that the vestibular folds __________.
a. are highly elastic b. articulate with the corniculate cartilages c. are involved with he production of sound d. play no part in sound production
The mesoderm forms
A) muscle. B) epidermis. C) the brain. D) the lining of the digestive tract. E) respiratory epithelium.