Which of the following statements about innate immunity is FALSE?
a. It involves a variety of chemicals, including defensins and complement.
b. It involves a variety of cells, including phagocytes and NK cells.
c. It protects against viruses and other pathogens.
d. It must be primed by the presence of antigens.
e. It has no memory of prior exposure to an organism.
D
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Which of the following is NOT a hallmark of cancer?
A. Cell division in the absence of growth signals. B. Resistance to signals that slow cell division or promote death. C. Metastasis, which allows invasion of local tissues. D. Ability to stimulate growth of blood vessels to provide nutrients to the rapidly growing tumor. E. All of these choices are hallmarks of cancer.
Damage to the tendons that pass over the wrist causes
a. Ehlers-Danlos syndrome. b. tarsal tunnel syndrome. c. Pierre-Robin syndrome. d. carpal tunnel syndrome. e. Wolf-Parkinson-White syndrome.
Cells able to divide and form some types of cells in an organism are called:a
pluripotent stem cells. b. terminal differentiation cells. c. determinate cells. d. morphogenic cells. e. developmental plastic cells.
Which of the following is a function of the nucleus?
A. stores DNA B. stores sugars C. builds proteins D. packages proteins