Initiation of apoptosis occurs primarily with:
a. Activation of p53
b. Cleavage of appropriate caspases at timely intervals
c. Stimulus from an inflammatory response
d. Activation of BCL-2
Correct answer: B
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Because the genetic information to be passed on to future generations is contained in the strict sequence of nitrogenous bases, the loss or change of a base in the DNA chain represents a (an)
a. aneuploidy. b. bleb. c. covalent cross-link. d. mutation.
The term gravida means the number of ________.
A. births after 20 weeks gestation B. total pregnancies C. months the woman has been trying to conceive D. fetuses that did not reach the age of viability
Patients with multiple rib fractures may develop significant hypoxia because of a ventilation/perfusion mismatch, which occurs when:
A. vascular disruption severely inhibits the adequate exchange of gases in the lungs. B. the circulatory system is intact but the amount of available oxygen is diminished. C. alveolar surface area is greatly increased and the pulmonary capillaries are dilated.
The acronym PACS stands for
a. pixel and computed system. b. picture and communication system. c. picture archiving and communication system. d. portable archival computer system.