The "father of epidemiology" is:
a. hippocrates
b. edward jenner
c. john snow
d. john grault
Ans: a. hippocrates
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In humans and other mammals, X inactivation takes place:
A. early in development, with each new cell inheriting the same inactivated X chromosome as its parent cell. B. late in development, with each new cell inheriting the same inactivated X chromosome as its parent cell. C. throughout the lifetime of an organismâ€"with each new cell division, both X chromosomes are activated, and one is then inactivated in each new cell. D. early in development, with all maternal X chromosomes being inactivated and cells maintaining active copies of only the paternal X chromosome. E. early in development, with all paternal X chromosomes being inactivated and cells maintaining active copies of only the maternal X chromosome.
If a drug binds irreversibly to a postsynaptic receptor to prevent the binding of an excitatory neurotransmitter, what is
the most likely result?
a. an increased number of IPSPs b. an increased number of EPSPs c. a prolonged hyperpolarization d. a decreased number of IPSPs e. a decreased number of EPSPs
While working in the lab, you observe that the only problem within a group of cells is that the cholesterol, lipid, and estrogen production rates have begun to decline. Which organelle would most likely be damaged?
Currently, the human population of the world
A. has reached its carrying capacity. B. is stable. C. is declining in much of the world. D. is increasing rapidly.