Examlex
Cell division begins ________ after conception.
Barbiturates
Depressant drugs, such as Nembutal and Seconal, that decrease central nervous system activity.
Depressant Drugs
A class of substances that reduce the activity of the central nervous system, leading to sedation, relaxation, and decreased inhibition.
Central-Nervous-System Activity
Refers to the functions and processes carried out by the brain and spinal cord.
Maturational
Related to or involving the process of maturation or coming of age, involving the natural progression of physical or psychological growth and development.
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