Exercise can convert white fat cells into brown fat cells.
Exercise can convert white fat cells into brown fat cells.
基底层细胞不断生长、增殖，形成所有其他表皮细胞。 A: The cells of basal layer keepgrowing and multiplying and formall the other epidermis cells. B: The cells in the basal layer are constantly growing and multiplying and give rise to all the other cells in the epidermis.
基底层细胞不断生长、增殖，形成所有其他表皮细胞。 A: The cells of basal layer keepgrowing and multiplying and formall the other epidermis cells. B: The cells in the basal layer are constantly growing and multiplying and give rise to all the other cells in the epidermis.
Why are some genes sometimes turned on and other times turned off? () A: Because<br/>sometimes cells are hungry. B: Because<br/>cells need to rest. C: Because only<br/>when the products are needed by cells. D: Because<br/>cells want to use up some products.
Why are some genes sometimes turned on and other times turned off? () A: Because<br/>sometimes cells are hungry. B: Because<br/>cells need to rest. C: Because only<br/>when the products are needed by cells. D: Because<br/>cells want to use up some products.
Interferons are a family of eukaryotic cell proteins classified according to the cell of origin. IFN-ɑ and IFN-β are produced by a variety of virus-infected cells. They A: act on target cells to inhibit viral replication B: act directly on the virus C: are virus-specific D: all of above
Interferons are a family of eukaryotic cell proteins classified according to the cell of origin. IFN-ɑ and IFN-β are produced by a variety of virus-infected cells. They A: act on target cells to inhibit viral replication B: act directly on the virus C: are virus-specific D: all of above
一个人的肌肉细胞和神经细胞的形态特征、功能完全不同，但是二者却具有相同的DNA序列，这是因为 （ ） A: They actually have different DNA in the two types of cells. B: The two different cells become mutated C: The genome of the different cells changes D: The proteins expressed in each cell are different
一个人的肌肉细胞和神经细胞的形态特征、功能完全不同，但是二者却具有相同的DNA序列，这是因为 （ ） A: They actually have different DNA in the two types of cells. B: The two different cells become mutated C: The genome of the different cells changes D: The proteins expressed in each cell are different
Which of the following descriptions about the specimen is incorrect?[img=786x530]1803c38d86b0179.jpg[/img] A: This picture shows the microscopic features of a benign tumor. B: These tumor cells have cellular and nuclear variation in size and shape. C: The blue arrows show that the ratio of nuclei-cytoplasm in tumor cells is higher than it of normal cells. D: The red arrow shows an abnormal tripolar spindle, an indicator of cellular atypia.
Which of the following descriptions about the specimen is incorrect?[img=786x530]1803c38d86b0179.jpg[/img] A: This picture shows the microscopic features of a benign tumor. B: These tumor cells have cellular and nuclear variation in size and shape. C: The blue arrows show that the ratio of nuclei-cytoplasm in tumor cells is higher than it of normal cells. D: The red arrow shows an abnormal tripolar spindle, an indicator of cellular atypia.
Which of the following cells possess the features of typical serous cells?() A: Parietal cells B: Chief cells C: Goblet cells D: Absorptive cells E: ECL cells
Which of the following cells possess the features of typical serous cells?() A: Parietal cells B: Chief cells C: Goblet cells D: Absorptive cells E: ECL cells
The stem cells in the epidermis are:() A: basal cells B: spinous cells C: Langerhans cells D: Merkel cells E: keratinocytes
The stem cells in the epidermis are:() A: basal cells B: spinous cells C: Langerhans cells D: Merkel cells E: keratinocytes
which cell can only exit in small intestine: A: endocrine cells B: stem cells C: goblet cells D: Paneth cells E: absorptive cells
which cell can only exit in small intestine: A: endocrine cells B: stem cells C: goblet cells D: Paneth cells E: absorptive cells
The cells that play the most important role in regulation of the coagulation and anti-coagulation balance are A: nerve cells B: hepatic cells C: mononuclear phagocytes D: endothelial cells E: spleen cells
The cells that play the most important role in regulation of the coagulation and anti-coagulation balance are A: nerve cells B: hepatic cells C: mononuclear phagocytes D: endothelial cells E: spleen cells