Which of the following is true of an antigenic drift?
A. When the virus undergoes a major change in its surface proteins such as hemagglutinin and neuraminidase, it is considered an antigenic drift.
B. Small changes in viral surface proteins are known as an antigenic drift and result in decreased vaccine effectiveness.
C. Antigenic drift can prevent the antibody from recognizing the organism if exposure reoccurs.
D. None of these are correct.
Answer: B
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The independent variable in the research question, "What is the effect of noise levels on postoperative pain in ICU patients?" is which of the following?
A) Surgery B) ICU patients C) Noise levels D) Postoperative pain
A female patient is in labor. The nurse could use all of the following complementary therapies to aid with childbirth EXCEPT
a. tai chi c. music b. massage d. aromatherapy
A patient becomes agitated after talking to his wife on the phone. His heart rate increases from 80 to 100 beats per minute (BPM). What effect does this have on his cardiac output?
A) It decreases. B) It increases. C) It decreases first, then increases. D) It does not change.
The patient demonstrates understanding of the implications for future pregnancies secondary to her classic uterine incision when she states:
1. "The next time I have a baby, I can try to deliver vaginally." 2. "The risk of rupturing my uterus is too high for me to have any more babies." 3. "Every time I have a baby, I will have to have a cesarean delivery." 4. "I can only have one more baby."