42.The sodium/calcium exchanger (NCX) transports three sodium into the cell for every one calcium out of the cell. Given what you know about ion concentrations, which of the following is/are true? A. sodium is being transported against its concentration gradient B. sodium is being transported with its concentration gradient C. calcium is being transported against its concentration gradient D. calcium is being transported with its concentration gradient Using a cell line, you are experimenting on transporters in the laboratory. You apply to the cell a chemical that inhibits the Na+/K+ ATPase. What do you notice about other transportation mechanisms across the cell membrane? Choose all that are correct. A. symporters cease to work B. antiporters cease to work C. movement of ions thru channels is altered as concentration gradients diminish D. calcium ATPase ceases to work 44.The sodium/glucose transporter (SGLT) moves ------------ and is a type of ------------------ A. sodium out of the cell with its concentration gradient and glucose into the cell against its concentration gradient; countertransporter B. sodium into the cell with its concentration gradient and glucose into the cell against its concentration gradient; cotransporter C. sodium out of the cell with its concentration gradient and glucose out of the cell with its concentration gradient; cotransporter D. sodium into the cell with its concentration gradient and glucose into the cell with its concentration gradient; countertransporter
42.The sodium/calcium exchanger (NCX) transports three sodium into the cell for every one calcium out of the cell. Given what you know about ion concentrations, which of the following is/are true?
| A. |
sodium is being transported against its concentration gradient |
|
| B. |
sodium is being transported with its concentration gradient |
|
| C. |
calcium is being transported against its concentration gradient |
|
| D. |
calcium is being transported with its concentration gradient |
Using a cell line, you are experimenting on transporters in the laboratory. You apply to the cell a chemical that inhibits the Na+/K+ ATPase. What do you notice about other transportation mechanisms across the cell membrane?
Choose all that are correct.
| A. |
symporters cease to work |
|
| B. |
antiporters cease to work |
|
| C. |
movement of ions thru channels is altered as concentration gradients diminish |
|
| D. |
calcium ATPase ceases to work |
44.The sodium/glucose transporter (SGLT) moves ------------ and is a type of ------------------
| A. |
sodium out of the cell with its concentration gradient and glucose into the cell against its concentration gradient; countertransporter |
|
| B. |
sodium into the cell with its concentration gradient and glucose into the cell against its concentration gradient; cotransporter |
|
| C. |
sodium out of the cell with its concentration gradient and glucose out of the cell with its concentration gradient; cotransporter |
|
| D. |
sodium into the cell with its concentration gradient and glucose into the cell with its concentration gradient; countertransporter |
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