What is the most important force in venous flow?
A. Cardiac suction
B. The pressure generated by the heart
C. The skeletal muscle pump
D. The one way flow due to valves
E. The thoracic (respiratory) pump
Answer: B
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During bone repair, how long does the stage of the bony callus last?
A. 12-24 hours B. 3-4 months C. 1-2 years D. 8-10 days E. 1-2 weeks
A cell has experienced a mutation that results in uncontrolled cell division. Which of the following types of defense cell would most likely interact with the mutated cell and how?
A. This is an antigen-presenting cell that interacts with the mutated cell through an MHC class I molecule. B. This is a cytotoxic T cell that interacts with the mutated cell through an MHC class I molecule. C. This is a cytotoxic T cell that interacts with the mutated cell through an MHC class II molecule. D. This is an antigen-presenting cell that interacts with the mutated cell through an MHC class II molecule.
The anorectal flexure of the anal canal:
A) occurs at the level of S3. B) is maintained by the transverse rectal folds. C) is where the alimentary tract penetrates the pelvic diaphragm. D) is within the rectovesical pouch. E) is where the omental appendices cease.
Explain why animals are used in research. Are there any limitations to the application of animal data to human physiology? Could these limitations be addressed using cell or tissue culture, or computer simulations?
What will be an ideal response?