Since all action potentials are identical, the intensity of a sensation depends on:
a. whether a myelinated or unmyelinated neuron has been stimulated.
b. the duration of the stimulation.
c. whether the neuron stimulated is a pre- or postsynaptic neuron.
d. the total number of neurons stimulated and the frequency of their discharge.
e. the presence of an EPSP or IPSP, which allows for a graded response.
d
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An acoelomate is an animal that
A. has a coelom. B. has a pseudocoelom. C. has both a coelom and a pseudocoelom. D. has neither a coelom nor a pseudocoelom. E. has a coelom during early development but later loses it.
When primatologists apply principles of animal behavior to humans, they sometimes find instances when morally repugnant behavior may be evolutionarily adaptive. For example, human males are more likely to abuse other mens' infants than they are to abuse their own. This behavior is seen in other mammals as well. How can it be explained in the light of evolutionary adaptations, and how should
society as a whole address it? What will be an ideal response?
Inhibitors of which of the following would interfere with nitric oxide stimulation of cardiac artery dilation through relaxation of smooth muscle cells?
A) protein kinase G. B) nitric oxide synthase C) guanylyl cyclase D) calmodulin E) Inhibitors of all of the above would interfere with nitric oxide stimulation.
Invertebrate diversity contributes to all of the following except
A) medicines. B) food sources for humans. C) bioremediation. D) cosmetics.