One of the ways in which neurotransmitter is removed from the synaptic cleft is
A. reuptake by the presynaptic cell.
B. endocytosis by the postsynaptic cell.
C. dendritic lassos.
D. phagocytosis by a macrophage.
Answer: A
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A condition in which the brain is substantially missing is
A. spina bifida. B. muscular dystrophy. C. amyotrophic lateral sclerosis. D. anencephaly. E. cerebral palsy.
Match the following:
A) Conduction deafness B) Otitis media C) Night blindness D) Glaucoma 1) A condition that can result from a deficiency of vitamin A. 2) A condition of deafness that may result from otosclerosis. 3) An inflammation of the lining of the middle ear. 4) A condition often leading to blindness due to increased intraocular pressure.
Salt was added to a beaker of distilled water (the water was not stirred). A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours
A. the samples would still be 2% and 20% respectively. B. the difference in the percentage of salt between the top and bottom samples would increase. C. the salt would float to the top. D. the percentage of salt in the top and bottom samples would be approximately equal. E. None of the choices are correct.
What supports the spiral organ (organ of Corti)?
A) membranous labyrinth B) tectorial membrane C) tympanic membrane D) basilar membrane