Which of these word part pairs has opposite meanings?
A) anter/o, poster/o-
B) front/o-, ventr/o-
C) later/o-, sagitt/o-
D) super/o-, cephal/o-
A
Explanation: A) Correct!
B) These have similar meanings.
C) These do not have the same meaning, but they are not opposites.
D) These have similar meanings.
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Memory T cells, effector T cells, and naïve T cells share several characteristics. Which of the following descriptions could only be said of memory T cells?
A. Memory T cells are activated by any APC. B. Memory T cells are only found in one location and do not circulate. C. Memory T cells express CD44, CD62L, and CCR7. D. Memory T cells recognize MHC class I or class II peptides displaying antigen molecules. E. Memory T cells depend upon co-stimulatory signals from CD2/ LFA-3, CD45R/ CD22, and LFA-1/ ICAM-2.
Which of the following statements is TRUE regarding the asymptomatic phase of HIV infection?
A. This period can last from 2 to 20 years. B. During this time the virus is progressively infecting and destroying cells of the immune system. C. During this period, people can transmit the disease to others even if they are symptom free. D. During this time, the virus is progressively infecting and destroying cells of the immune system, and people can transmit the disease to others even if they are symptom free. E. All of these choices are correct.
The emotions that the brain produces are a mixture of ____
A) ?feelings and physical responses B) ?actions and physical changes C) ?feelings of euphoria or sadness D) ?feelings of anger or happiness E) ?sensation and action
Which of the following statements about suicide is TRUE?
A) It is the leading cause of death among people age 15-24. B) Globally, adults age 70 years and older are more likely to commit suicide than younger adults. C) College students now account for nearly 98 percent of all suicides. D) Firearms are the most commonly used method of suicide among both men and women.