Ions are transported across membranes using __________, which requires __________.
A. channel-mediated facilitated diffusion; kinetic energy
B. simple diffusion; kinetic energy
C. channel-mediated facilitated diffusion; ATP energy
D. carrier-mediated facilitated diffusion; ATP energy
Answer: A. channel-mediated facilitated diffusion; kinetic energy
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The hormone oxytocin is controlled by a(n) ____________________ feedback loop during the birthing process
Fill in the blank(s) with correct word
Which artery is a branch of the celiac trunk?
A. Right gastric artery B. Right gastro-omental artery C. Left gastro-omental artery D. Left gastric artery E. Superior mesenteric artery
A 30-year-old male experienced a crushing injury when his arm was trapped between the back of a truck and a loading dock. Upon your arrival, the man's arm has been freed. Your assessment reveals that his arm is obviously deformed and swollen and is cold and pale. Further assessment reveals an absent radial pulse. You should be MOST concerned that this patient has:
A. internal hemorrhage. B. compartment syndrome. C. a severe closed fracture. D. damage to the radial nerve.
Which must happen in order for an action potential to begin?
A. The membrane potential must be at the Na+ equilibrium potential. B. Na+ influx must exceed K+ efflux. C. The membrane must be out of the relative refractory period. D. Na+ channels must all be inactivated. E. Multiple inhibitory postsynaptic potentials (IPSPs) must summate.