What activates the intrinsic/contact activation pathway of coagulation?
A) Release of tissue factor (Factor III) by subendothelial cells
B) Factor XII contacts exposed collagen fibers.
C) Fibrinogen is converted to fibrin.
D) Prothrombin is converted to thrombin.
Answer: B
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Which of the following is TRUE about x-ray film?
a. only handle film by the corner c. keep film in a light, tight bin b. place a film in every cassette d. all of the above
Prions are pathogenic proteins that are linked to different neurodegenerative diseases. Investigations of some have indicated that normal cellular proteins and prions have the same amino acid sequence. How is this possible?
A. Though the primary structure is the same between the prion and the normal cellular protein, differences at higher levels (secondary or tertiary) alter protein activity. B. The amino acids of the prion must have more hydrophilic sections, causing it to interact with the lipids of the plasma membrane and disrupting cell activity. C. The amino acid sequence is not important to the function of the protein because protein function is completely determined by the pH of the environment. D. The double helix structure of proteins is easily altered by separating the nitrogenous bases holding the strands together, allowing for a protein to act as a prion.
You hear a sharp noise to your left causing you to shift your eyes in that direction. Which muscles were responsible for your glance?
A. Left eye - superior oblique, right eye - inferior oblique B. Left eye and right eye - medial rectus C. Left eye and right eye - lateral rectus D. Left eye - lateral rectus, right eye - medial rectus E. Left eye - medial rectus, right eye - lateral rectus
Compare and contrast the terms work, energy, potential energy, and kinetic energy
What will be an ideal response?