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A patient arrives for an abdominal ultrasound.  Upon interrogation you see a mass protecting into the lumen that arise from the gallbladder wall, it does NOT shadow and does NOT move with a change in patient position, and no comet-tail artifact seen. What is the likely diagnosis?

  Patient who had RUQ pain, fever, and elevated white blood cell count (WBCC). Ultrasound shows gallbladder wall thickening. Most probably the diagnosis is:

A 45-year-old female patient with a history of chronic dieting presents with acute abdominal pain after fatty meals that radiates to her shoulders. Which of the following sonographic presentations do you expect to find?  

Which of the following is the most likely clinical finding of adenomyomatosis?  

What pathology is diagnosed by the sonographic demonstration of worms in the bile ducts?  

Tumefactive sludge can resemble the sonographic appearance of:  

A 68-year-old man presents with anorexia and weight loss. Most probably the metastasis is from?      

Give an example of changing a behavior through respondent conditioning. 

All the behavior an organism is capable of emitting on the basis of species and environmental history.

Give an example of changing a behavior through operant conditioning.