Which is the prime mover (agonist) used in smiling, when the corners of your moth lift upward?
A. Orbicularis oris
B. Zygomaticus
C. Masseter
D. Orbicularis oculi
Answer: B
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In the male, the prostate gland surrounds the distal urethra.
Answer the following statement true (T) or false (F)
If we were able to artificially alter the membrane permeability of pacemaker cells so that sodium influx is more rapid, ________.
A) threshold is reached more quickly and heart rate would increase B) potassium channels compensate and no change in heart rate would occur C) heart rate would decrease, but blood pressure would rise due to the excess sodium present D) tetanic contraction would occur due to the short absolute refractory period of cardiac muscle
The longest and heaviest bone in the body is the:
a. tibia b. fibula c. coxal d. femur
Even though all action potentials are the same, the brain can differentiate a variety of stimuli by source and intensity
The mechanism by which the nervous system converts these action potentials into meaningful information is called neural ________. A) integration B) coding C) facilitation D) recruitment E) pooling