Which of the following has a fixed volume but not a fixed shape?

The part of the nephron provides initial filtering of the blood in the urinary system.

Tessa’s friend milo offers her a ride home. tessa does not like riding with milo. he insists that everyone wear a seat belt, and he listens to classical music. he drives a small car, and usually texts while driving. why should tessa refuse milo’s offer? milo texts while driving. milo listens to classical music. milo drives a small car. milo insists that everyone wear a seat belt.

During polarization,potassium has a blank charge,sodium has a blank ch arge ,and calcium has a b l ank. charge