The main difference between a cohort study and a randomized trial is that

A) cohort studies are longitudinal and randomized trials are cross-sectional.
B) only clinical trials can evaluate the effect of a drug.
C) randomized trials are experimental and cohort studies are observational.
D) clinical trials are observational and cohort studies are experimental.
E) at the beginning of a clinical trial, participants are free of disease, and cohort studies start with patients with a disease.

When a patient has symptoms that may indicate more than one condition, what must the practitioner do first?

A) Make a differential diagnosis
B) Determine the treatment plan
C) Develop a prognosis
D) Establish a follow-up appointment
E) Perform a follow-up examination

​At the beginning of the day,visually inspect all exam rooms and lab areas.What items should you inspect and tasks should you perform?

A) ​Replace examining paper and empty waste receptacles.
B) ​Observe temperature and plug in any disconnected electrical equipment;check the water level in the autoclave and turn it on.
C) ​Restock supplies and maintain inventory.
D) ​All of the above.

A type of heat therapy in which a machine uses ultrasound, shortwave, or microwave to achieve deep heat penetration in muscle tissue is ________.

Methods of collecting patient data include mirroring, which includes ____.

A) blocking further communication
B) restating what the patient says almost exactly as the patient says it
C) interpreting what you believe the patient is saying
D) motivating the patient to describe the situation in his own way
E) asking closed-ended questions

In which procedure does a radiologist instill barium sulfate through the anus into the rectum and then into the colon?

A) Barium swallow
B) Nuclear medicine imaging
C) Barium enema
D) Cholangiography
E) KUB radiography

Ted came to the office feeling weak and has had significant weight loss recently. His blood tests show that his T-cell count is 178, his temperature is 102.4, and his blood pressure is 100/62. Based on his signs and symptoms, the practitioner might perform further tests to rule out ______.

A) systemic lupus erythematosus.
B) chronic fatigue syndrome.
C) lymphedema.
D) AIDS.
E) mononucleosis.

Which of the following types of fractures happens when a tiny bone piece breaks off at the point where a ligament or tendon attaches to the bone?

A) Avulsion
B) Burst
C) Comminuted
D) Depressed