Following an injury to his arm, a patient complains that he has no sensations from the thumb, index finger, middle finger, and part of the ring finger. What nerve do you suspect to be damaged?
A. Musculocutaneous nerve
B. Axillary nerve
C. Radial nerve
D. Median nerve
E. Ulnar nerve
Answer: D
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When a protein is synthesized on fixed ribosomes, it is threaded into the lumen of which structure(s)?
A) endoplasmic reticulum B) the Golgi apparatus C) nucleoli D) transport vesicles E) secretory vesicles
The model that explains how an enzyme and substrate fit together is called the ________.
enzyme-substrate model lock-and-key model conformational model induced-fit model
________ fills the membranous labyrinth
A) Interstitial fluid B) Perilymph C) Endolymph D) CSF E) Plasma
Cardiac muscle has very little capacity for regeneration because it lacks ________.
A. sarcomeres B. somatic nerve fibers C. satellite cells D. dense bodies E. an endomysium