GR - Cells and the Extracellular Environment I - Copy

GR - Cells and the Extracellular Environment I - Copy -...

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Guided Reading - Cells and the Extracellular Environment I 1. Which of the following is a function of the steep Na + /K + gradient across the cell membrane? A. provides energy for coupled transport B. creates electrochemical impulses C. maintains osmotic pressure D. All of these choices are correct. 2. Ions like Ca 2+ can be second messengers for cell signaling. True False 3. Hypertonic solutions stimulate cellular lysis. True False 4. In secondary active transport, if the other substance is moved in the same direction as Na + , it is called 5. ___________ g of sucrose (molecular weight = 342g) would be added to 1L of water to produce a 2.5 Osm solution. A. 342 B. 500 C. 855 D. 2.5 6. The Na + /K + pump creates a ____________ charge inside the cell. A. positive B. negative
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