The form of anemia caused by lack of dietary iron is
A. pernicious anemia.
B. iron deficiency anemia.
C. aplastic anemia.
D. hemolytic anemia.
Answer: B
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Which of the following is true regarding lactose intolerance?
A) The stomach produces inadequate amounts of lactase. B) Lactose-intolerant infants cannot digest dairy fat and are at risk of starvation. C) The person cannot digest any type of monosaccharide. D) The intestinal crypts are not producing the enzyme lactase. E) The enzyme maltase begins to digest lactose.
Neurons in the CNS of the adult don't contain centrioles. What does that tell you about CNS neurons?
A) They don't replicate themselves. B) They don't produce any products. C) It doesn't tell you much of anything. D) They don't carry nerve impulses.
The primary wave of peristalsis in the esophagus is initiated by the ____________ center, located in the medulla. If this primary wave fails to push the bolus to the stomach, a secondary peristaltic wave is initiated by the ________________
Fill in the blank(s) with correct word
Cytotoxic T cells:
A. secrete perforin, which kills bacteria and viruses by perforating the membrane or coat that surrounds them. B. are activated by interleukin 1. C. require Class I MHC proteins to recognize foreign antigens. D. are converted to plasma cells when activated by MHC proteins. E. secrete proteins that neutralize bacterial toxins.