Total electrolyte concentration affects the body's fluid balance. Nutrients and oxygen must enter body cells, whereas waste products exit the body
Based on this information, the student nurse has to prepare a chart for a clinical postconference on the ways that movement occurs across the cellular membrane. What are ways that the student nurse should include in the chart on movement across the cellular membrane?
1 . Molecules move through the cell membrane, including oxygen, carbon dioxide, and steroids.
2 . Substances pass through membrane channels and these channels are the same size.
3 . Carrier molecules in the membrane assist substances across the barrier.
4 . A vesicle transports small molecules or whole cells across the plasma membrane.
A) 1, 2
B) 1, 3
C) 2, 4
D) 3, 4
B
Feedback:
Molecules move through the cell membrane, including oxygen, carbon dioxide, and steroids. Carrier molecules in the membrane assist substances across the barrier. Substances pass through membrane channels. These channels are of various sizes and allow only a certain size range and electrical charge to traverse the membrane. A vesicle (membrane-bound sac) transports large molecules or whole cells across the plasma membrane.
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