Most organ transplants fail because
a. of poor vascular connection between host
and donor tissue.
b. the migrating leukocytes attack the tissue
adjacent to the transplant.
c. of the activity of cytotoxic T cells.
d. introduced tissues produce antibodies that
cause a massive reaction.
e. of all of these.
C
You might also like to view...
Phagocytes have a pathogen-recognition system known as ________ that leads to the recognition, containment, and destruction of a pathogen
A) collagen B) fibrin C) pattern recognition receptors (PRR) D) pathogen associated molecular pattern (PAMP)
Communal courting areas are called
A. leks. B. mating structures. C. resource areas. D. territories. E. breeding grounds.
Saltatory conduction is
A) the process of conduction leaping along myelinated neurons. B) an action potential generated in taste receptors or buds. C) the movement of neurotransmitters across a synaptic cleft. D) the activation of the fight-or-flight response. E) the movement of an electrical impulse from the dendrite to an axon.
Which of the following may have cell walls containing teichoic acids?
A) Gram-negative bacteria only B) Gram-positive bacteria only C) archaea D) both Gram-positive and Gram-negative bacteria E) all prokaryotes