Which breathing abnormalities can occur in neonatal mammals exposed to nicotine?
a. reduced ventilatory output
b. increased duration of apneas
c. SIDS
d. reduced ventilatory output and increased duration of apneas
e. reduced ventilatory output, increased duration of apneas, and SIDS
ANSWER: d
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Your friend wants to know why patients that receive organ transplants have to take immune-suppressing drugs for the rest of their lives. You tell her that:
1.The transplanted organ will only work properly with the immune-suppressing drugs. 2.The MHC markers of the donor organ do not match the patient, so the patient’s immune system will reject the organ without the medication. 3.The donor organ has a different MHC marker, which will attack and kill the patient’s cells if the medication isn’t taken regularly. 4.The medication is needed so the patient will not get sick after the transplant, which could cause the new organ to not function properly.
Which of the following is not true of type III hypersensitivity?
A. Serum sickness is a systemic response. B. It involves an immune complex reaction. C. Antigen-antibody complexes are deposited in the basement membrane of epithelial tissues. D. It involves production of IgE antibodies. E. The Arthus reaction is a local response.
Most conifers have separate male and female reproductive parts on the same tree. This condition is referred to as:
a. deciduous. b. dioecious. c. monoecious. d. homosporous. e. heterosporous
Which of the following would you expect to dissolve poorly in water?
A. Anions B. Cations C. A substance with a lot of polar covalent bonds D. A substance with a lot of non-polar covalent bonds