When a disease maintains a relatively steady, low-level frequency at a moderately regular interval, it is called ________.
A. an endemic
B. hyperendemic
C. sporadic
D. an epidemic
Answer: A
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Fertilization leading to a viable pregnancy in mammals occurs in the
a. ovary. b. uterus. c. vagina. d. oviduct. e. follicle.
Which of the following statements about reflex actions is true?
a. Reflex actions regulate breathing. b. Some reflex actions are unpredictable and may require conscious thought. c. When you withdraw your hand from a hot stove, the feeling of pain is part of the reflex response. d. Awareness of the heat of fire must occur before a withdrawal reflex can take place. e. Reflex actions involve five types of neurons
Which of the following is NOT an effect an antibody might have on a target cell?
A) neutralization B) agglutination C) opsonization D) lysis
During REM sleep, an EEG shows
A) a flat trace with very few waves. B) a pattern that is similar to when a person is in deep sleep. C) an irregular, rapidly changing pattern.