As the subcortically produced reflexes gradually disappear
A. the diameter of the dendrites slowly increase, accelerating the velocity of the stimulation
B. the diameters of the dendrites slowly decrease, decelerating the velocity of the stimulation
C. motor nerve cell activity decreases
D. involuntary movements increase, and primitive reflexes predominate
Question 2Locomotion refers to
A. voluntary use of the hands
B. head control
C. upright posture
D. creeping and crawling
Question 3Voluntary movement begins to appear in most infants around the
A. first year of life
B. eighteenth month of life
C. sixth month of life
D. fourth week of life
Question 4At approximately 12 months of age an infant can usually
A. roll from supine to prone position
B. sit when holding an external supporting object
C. sit alone
D. roll from supine to prone, sit alone, and sit when holding an external object
Question 5In the initial stages of body control
A. the progression begins at about 8 months of age
B. the forearms and hands play a minimal role
C. the forearms and hands play a primary role
D. infants will attempt to roll from a supine to a prone position only with manual assistance by an adult
Question 6The number of different stereotypies
A. is not observable in the first year of life
B. depends on the gender of the child
C. depends on the ethnic background of the child
D. increases throughout the first year of life
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