Sound waves travel within the ear and cause hair cells of the organ of Corti to rub against the
__________, initiating nerve impulses to the brain.
a. basement membrane
b. basilar membrane
c. tectorial membrane
d. tympanic membrane
e. plasma membrane
C
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Plain soap is very effective in controlling spread of microorganisms because it is
A. bacteriostatic. B. very effective at the mechanical removal of microorganisms. C. virucidal. D. bactericidal.
What is a primary function of the hormone calcitonin?
A. initiates stress response B. raises blood glucose level C. lowers blood glucose level D. stimulates bone growth E. inhibits loss of calcium from bone
A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle
Indicate whether the statement is true or false
The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called
A) mitosis. B) cytokinesis. C) binary fission. D) telophase.