A receptor cell
a. is involved in converting stimulus energy into action potentials.
b. is specialized to respond to a particular sensory modality.
c. can often be found in a sense organ grouped with other cells responsive to the same adequate stimulus.
d. all of these.
e. none of these.
D
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A midcoronal plane runs crosswise through the body at right angles to the sagittal plane, dividing the body into superior and inferior parts.
Answer the following statement true (T) or false (F)
Central adaptation refers to
A) the decline in activity of peripheral receptors when stimulated. B) a characteristic of phasic receptors. C) inhibition of nuclei located along a sensory pathway. D) increases in conscious perception of a sensory stimulus. E) a change in motor receptivity of a neuron.
The principle of conservation of momentum restates which of Newton's laws?
A. inertia B. acceleration C. action/reaction D. gravitation
Of the different sources of genetic variability which one causes the variation in the combinations of homologs from paternal and maternal linage found within a haploid cell?
A) independent assortment B) crossing over C) random fertilization D) mutation