【单选题】When an injury occurs, which type of cells has the ability of recognizing microbes and necrotic cells and releasing mediators such as histamine that cause smooth muscle cells to relax?
【单选题】The title “Cell-to-cell contact induces mesenchymal stem cells to differentiate into cardiomyocyte and smooth muscle cells” is a declarative sentence because the authors may ________.
A.
want to state their findings as clearly and completely as possible
B.
want to show the complexity of their research design and findings
C.
have found strong evidence to prove that cell-to-cell contact induces the differentiation of mesenchymal stem cells