【单选题】患者,男性,50岁。患慢性肾功能衰竭,近日恶心、呕吐,进食明显减少,并伴有尿少,血清钾浓度增高达8.9mmol/L,在病情观察时,须警惕可能出现()。
【单选题】患者男,50岁。患慢性肾衰竭,近日恶心、呕吐,进食明显减少,并伴有尿少,血清钾浓度达8.9mmoL。在病情观察时,须警惕可能出现
【单选题】患者男,50岁。患慢性肾衰竭,近日恶心、呕吐,进食明显减少 ,并伴有尿少,血清钾浓度增高达8.9mmol/L。在病情观察时,须警惕可能出现
【单选题】三相异步电动机的正反转控制,关键是改变( )
【单选题】慢性肾衰竭患者,近日恶心、呕吐,进食少,并有尿少、脉缓,血清钾10.2mmol/L。估计患者病情恶化,最可能出现的情况是
【单选题】Which of the following cells are steroid hormone secreting cells?
C.
Cells of zona glomerulosa
【单选题】关于学龄儿童神经精神发育,不正确的叙述()
【单选题】Which of the following cells have no gap junctions between cells?
【单选题】患者男性,40岁,患慢性肾衰竭,近日恶心、呕吐,进食明显减少,并伴有尿少,血清钾增高达10.2mmol/L,在病情观察时,须警惕可能出现
【多选题】Cancer cells are totally different from normal cells in that:
A.
1. Cancer cells have a reduced dependence on signals from other cells for their survival, growth, and division. 2. Cancer cells can survive levels of stress and internal derangement that would cause normal cells to kill themselves by apoptosis.
B.
3. Unlike most normal human cells, cancer cells can often proliferate indefinitely. 4. Most cancer cells are genetically unstable, with a greatly increased mutation rate and an abnormal number of chromosomes.
C.
5. Cancer cells are abnormally invasive, at least partly because they often lack certain cell adhesion molecules, such as cadherins, that help hold normal cells in their proper place. 6. Cancer cells are abnormally avid for nutrients, which they use to generate much of their ATP by glycolysis in the cell cytosol.
D.
7. Cancer cells can survive and proliferate in abnormal locations, whereas most normal cells die when misplaced. 8. As cancer cells evolve, they secrete signals that influence the behavior of cells in the surrounding connective tissue, thereby modifying the tumor’s microenvironment.