The central nervous system is most susceptible to major malformation during which one of the following periods of development?
A. Weeks 1 to 10
B. Weeks 2 to 20
C. Weeks 20 to 40
D. Postnatal
ANS: B
Rationale: The central nervous system is most susceptible to major malformation between day 14 and week 20; the fundamental structures of the nervous system form during this period.
You might also like to view...
Which dimension of wellness includes optimism, trust, and self-confidence?
A) interpersonal wellness B) emotional wellness C) spiritual wellness D) physical wellness
_____, more commonly known as the flu, is an acute, highly contagious respiratory infection
Fill in the blank with the right word.
A medical term that means paralysis of four (limbs) is ________.
Fill in the blank(s) with the appropriate word(s).
Gas exchange (the delivery of oxygen and the removal of carbon dioxide) in the lungs takes place in the
A) aorta. B) bronchioles. C) right atrium. D) alveoli.