___ is a motion of a rigid body where a straight line in the body always remains parallel to itself.
a. velocity
b. acceleration
c. displacement
d. translation
e. rotation
Answer: d. translation
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Biomechanics
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- A 54-year-old male construction worker has had low back pain for about two months. He has had previous episodes of low back pain. Now, the pain is more intense than it was on prior episodes and seems to be getting worse rather than improving over time. He does remember lifting very heavy steel beams and the pain is now unbearable. He complains of numbness in both legs and across his buttocks. He is embarrassed to report that he was incontinent of urine and stool this morning. You should plan on:
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- A 56-year-old female with a known history of seropositive rheumatoid arthritis maintained on etanercept injections presents complaining of right knee pain and swelling for two days. She has been in good health otherwise and denies fevers and chills. She reports stiffness in the right knee that lasts for longer than 1 hour. Her other joints are doing well. You perform an arthrocentesis and remove 30cc of clear fluid. You send the sample to the lab, and 24 hours later no organisms are seen. The patient follows up later that day. The best course of management for this patient is:
- A 64-year-old woman diagnosed with gout has been taking chronic treatment for over one year. The prescribed medication enhances the excretion of uric acid. Her physician cautions her to contact him before starting any prescription or nonprescription medication. The antigout medication and many other drugs can compete for tubular transport. Examples include aspirin and other nonsteroidal anti-inflammatory drugs, loop and thiazide diuretics, certain anti-infective medications, and certain diabetes drugs. The chronic antigout medication prescribed for this patient is most likely:
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