Note that the concentration gradient will cause na+ quizlet

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A. up the concentration gradient B. down the concentration gradient C. from an area of lower concentration to an area of higher concentration D. in a direction that doesn't depend on concentration When the concentration of a solute is the same throughout a system, the system has reached _____. A. maximum concentration B. homeostasis

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binds to and inhibits Na/K ATPase reduces sodium removal from the cell --> decreased concentration gradient across membrane reduced concentration gradient causes reduction in calcium removal after contraction --> more calcium is uptaken by SR and released upon contraction --> increases heart contractility Thus the concentration of H + is equal to the HCl concentration. [H +] = 0.025 M H + We can calculate the concentration of OH-by rearranging the water dissociation constant expression to solve for [OH-] and plugging in 1.01 × 10-14 for K w and 0.025 for [H +]. Note that the [OH-] is not zero, even in a dilute acid solution.

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The Na+/K+ ATP-ase pump pumps three Na+ out of the cell and two K+ into the cell. 8. For secondary active transport to occur, a primary active transport process must have occurred to create and/or maintain a concentration gradient. True.Figure 3.24 Diffusion through a permeable membrane follows the concentration gradient of a substance, moving the substance from an area of high concentration to one of low concentration. Each separate substance in a medium, such as the extracellular fluid, has its own concentration gradient, independent of the concentration gradients of other ...

As noted earlier, synapses are the junctions where neurons pass signals to other neurons, muscle cells, or gland cells. Most nerve-to-nerve signaling and all known nerve-to-muscle and nerve-to-gland signaling rely on chemical synapses at which the presynaptic neuron releases a chemical neurotransmitter that acts on the postsynaptic target cell (see Figure 21-4).