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Biology

Critical Thinking Questions

BiologyCritical Thinking Questions

Critical Thinking Questions

16.

Why is it advantageous for the cell membrane to be fluid in nature?

17.

Why do phospholipids tend to spontaneously orient themselves into something resembling a membrane?

18.

Discuss why the following affect the rate of diffusion: molecular size, temperature, solution density, and the distance that must be traveled.

19.

Why does water move through a membrane?

20.

Both of the regular intravenous solutions administered in medicine, normal saline and lactated Ringer’s solution, are isotonic. Why is this important?

21.

Where does the cell get energy for active transport processes?

22.

How does the sodium-potassium pump contribute to the net negative charge of the interior of the cell?

23.

Why is it important that there are different types of proteins in plasma membranes for the transport of materials into and out of a cell?

24.

Why do ions have a difficult time getting through plasma membranes despite their small size?

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