The motor cortex is activated by a widespread pattern of neuronal discharge known as the:
a. activation potential
b. threshold potential
c. readiness potential
d. sensori-motor potential
e. autonomic potential
C
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Select the correct statement about olfaction
A) Olfactory receptors have a high degree of specificity toward a single type of chemical. B) Substances must be volatile and hydrophobic in order to activate olfactory receptors. C) Some of the sensation of olfaction is actually one of pain. D) Olfactory adaptation is only due to fading of receptor cell response.
Large molecules typically elicit an immune response better than smaller molecules
Indicate whether the statement is true or false
Which of the four curves of the adult vertebral column develop as an infant begins to lift its head?
A) pelvic B) thoracic C) cervical D) lumbar
How do lymphatic vessels differ from those of either the arterial or the venous system?
A) They have thicker walls than veins, but less thick than those of the arteries. B) They do not run together with either the arteries or the veins. C) They have very few significant differences. D) They have fewer valves than do the veins. E) The lymphatic valves are spaced close enough to give the vessel the appearance of a string of beads.