Circulation of CSF begins with formation in the spinal cord and terminates with absorption in the lateral ventricles

According to the discussion of infants' memory,

a there is no evidence of long-term memory until infants are about 6 months of age. b. the major problem in studying infants' memory is that babies cannot accurately see visual stimuli until they are 3 to 4 months old. c. it is so difficult to measure infants' memory that we do not know much about the memory skills of young infants. d in the infants' brain, some parts concerned with memory are not fully developed.

The ability that involves crystallized intelligence to the greatest extent is

solving an intellectual puzzle. interpreting a chemical formula. using words in an unusually creativity manner. analyzing relations between concepts.