A: the movement of electrons across the cell membrane.
B: the movement of hydrogen atoms across a mitochondrial membrane.
C: the movement of hydrogen ions across a mitochondrial membrane.
D: the movement of glucose through the cell membrane.
举一反三
- Membrane proteins are the functional units of cell membrane.
- The imbalance distribution of Na+ and K+ inside and outside the cell is due to () A: the high permeability of cell membrane to K+ in rest condition B: the increase of the permeability of the cell membrane to Na+ when excited C: the result that Na+ and K+ moving across the cell membrane by facilitated diffusion D: the effect of Na+ pump E: the effect of ATP
- The myelin sheath of the peripheral nerve consists of A: Schwann cell membrane and cytoplasm B: only Schwann cell cytoplasm C: multiple layers of Schwann cell membrane D: only the lipid of Schwann cell membrane E: Schwann cell membrane and basal lamina
- Glycolipids and glycoproteins are especially abundant in the A: nucleus. B: mitochondrial inner membrane C: cytosol D: plasma membrane
- Taking hollow fiber membrane module as an example, according to the way of water inflow, it can be classified as outside-in type: raw water enters from the outside of membrane, and purified water flows out from the inside of membrane. On the contrary, it is inside-out type. The working pressure of the inside-out type is higher than that of the outside-in type.
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Which of the following is FALSE about the nuclear envelope? A: It is not present in prokaryotic cells. B: It separates the contents of the nucleus from the cytoplasm. C: It consists of an outer nuclear membrane and an inner nuclear membrane. D: It is continuous with the Golgi apparatus.
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Which of the following is a consequence of myelination in large nerve fibers? A: Decreased velocity of nerve impulses B: Generation of action potentials only at the nodes of Ranvier C: Increased nonselective diffusion of ions across the axon membrane D: Increased membrane capacitance
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Taking hollow fiber membrane module as an example, according to the way of water inflow, it can be classified as outside-in type: raw water enters from the outside of membrane, and purified water flows out from the inside of membrane. On the contrary, it is inside-out type. The working pressure of the inside-out type is higher than that of the outside-in type. A: 正确 B: 错误
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All cells have a cell membrane made of proteins and ( ). A: lipids B: glucose C: amino acid D: fructose
- 4
The structure that constitutes the blood-testis barrier does not include A: capillary endothelium and basement membrane B: cell connection between spermatogonium C: tight juntion between sustentacular cell D: spermatogenic epithelial basement membrane