The basic way the nervous system works is() A: receptor B: sensory nerve C: effector D: nerve center E: reflex

未被特异性抗原激活的成熟T细胞称为 A: memory T cell B: naïve T cell C: cytotoxic T lymphocyte D: effector T cell

How a cell reacts to a signal depends on the set of intracellular signaling molecules each cell-surface receptor produces and how these molecules alter the activity of effector proteins, which have a direct effect on the behavior of the target cell.

Which of the following statements about tendon reflexes is wrong? A: single synaptic reflex B: The receptor is tendinous organ. C: Stretch reflex occurs when the tendon is pulled rapidly. D: The effector is the muscle fiber of the same muscle.