In a typical communication between cells, the signaling cell produces a particular type of intracellular signal molecule that is detected by the target cell.
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举一反三
- Communication between cells is mediated by cell signaling molecules and ( ). A: Cell receptor B: Antibody C: Enzyme D: Electric signal
- 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.
- In __________________ signaling, a cell-surface-bound signal molecule binds to a receptor protein on an adjacent cell. During embryonic development, for example, such signaling method allows adjacent cells that are initially similar to become specialized to form different cell types. A: endocrine B: contact-dependent C: paracrine D: neuronal
- Which of the following cell signaling molecules does the neurotransmitter belong to? ( ) A: Chemical signal B: Gas molecules C: Optical signal D: Electric signal
- Which of the following about cell cycle is NOT true？（ ） A: We can get the synchronization of the cells by blocking DNA synthesis by TdR. B: Cytokinesis of animal cells is mediated by a contractile ring of actin and myosin II filaments. C: Meiosis II is similar to meiosis I. D: According to the characteristics of cell division, cell groups can be divided into three types, such as Cycling cells, Terminally Differentiated cells and Quiescent cell.
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Methotrexate kills some types of cancer cells by inhibiting _____________________, an enzyme that produces a compound required for DNA synthesis during cell division.
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Protein kinase A itself is different in different cell types， which explains why the effects of cyclic AMP vary depending on the target cell. （ ）
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Cell organelles are located within the ____ of the cell. A: nucleus B: cytoplasm C: Cell membrane D: lysosomes
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The cells belonging to the outermost layer of the retina are: A: Pigment epithelial cell B: Bipolar nerve cell C: Cone cell D: Ganglion cell
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In the following cells, which cell is derived from monocytes A: fibroblast B: macrophage C: mast cell D: plasma cell E: fat cell