Colony-stimulating factors are cytokines made by
A) endothelial cells and fibroblasts from bone marrow.
B) white blood cells only.
C) endothelial cells, fibroblasts from bone marrow, and white blood cells.
D) endothelial cells.
E) fibroblasts from bone marrow.
C) endothelial cells, fibroblasts from bone marrow, and white blood cells.
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Which of the following choices is not a basic feature of cellular communication?
A) The signal must be produced. B) The signal can be produced only by a eukaryote. C) The signal must be transported to a target cell. D) The target cell must respond to the signal.
Manufacturers of some medications used to treat heartburn advertise that their products shut down the acid-producing pumps in the stomach. Where are these "acid-producing pumps"? In other words, which type of gastric gland cell secretes acid?
A. Chief cells B. Parietal cells C. Mucous neck cells D. Surface mucous cells E. Enteroendocrine cells
Based on its range of motion, the elbow is classified as a(n) ________ joint.
A. uniaxial B. multiaxial C. ellipsoid D. biaxial E. gliding
Which fluid has a higher concentration of solutes?
A. Interstitial fluid of tissues B. Blood plasma