The initial exposure to a foreign substance generates:
A) ?a general immune response.
B) ?a specific immune response.
C) ?neither kind of immune response.
D) ?both types of immune responses.
D
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Marjorie is in her seventh month of pregnancy with her first child. Which of the following is true regarding the child’s development??
a. ?It started having measurable REM sleep about three months ago. b. ?It has not yet had any exposure to food preferences. c. ?It is already within the range of a full-term birth. d. ?It can hear and recognize Marjorie’s voice.
The best way to deal with the potential problem of experimental bias is to use a double-blind study
Indicate whether the statement is true or false.
The deepest stage of sleep is ______ sleep
a. Stage 1 c. REM b. Stage 2 d. Stage 4
By middle childhood, obesity is a risk factor for ____
a. not being popular in middle school b. ADHD, primarily hyperactivity-impulsivity type c. schizophrenia d. a variety of emotional and behavior problems