If a person were to suffer a second degree burn to their fingers, which group of receptors would suffer the greatest amount of damage?
A. Ruffini endings
B. Meissner corpuscles
C. Pacinian corpuscles
D. Merkel disks
Answer: B
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All of the following statements about initiation and transmission of action potentials in neurons are correct EXCEPT:
A. The rate of transmission of an action potential is directly related to the diameter of the axon. B. Information about the intensity of a stimulus is conveyed by changes in the size of the action potential generated. C. The resting potential is maintained by differential ion permeabilities and the sodium-potassium pump. D. Once initiated, local depolarizations stimulate a moving wave of depolarization down the axon. E. A stimulus to the neuron can either depolarize or hyperpolarize the neuronal membrane.
Predict the result when a phosphate-containing chemical is released by a factory into a pond
A) All living things will always die in such cases. B) Eutrophication will occur. C) Climax species will invade. D) Predatory fish will increase in population faster than other living things.
The Food Guide Pyramid suggests that most Americans should increase their intake of ____ and reduce their intake of ___.
A. vegetables; dairy products B. water; cereals C. vegetables; fats D. meats; fruits
W hat was the major stumbling block for the acceptance of natural selection as a mechanism for evolution when proposed by Darwin?
a. lack of a fossil record b. lack of observational and experimental data c. lack of a plausible theory of heredity d. lack of evidence for artificial selection