Match the protozoa to the descriptions of how each one travels.
Cilates
propel with whip-like tails
parasites
sarcodines
move among organisms
flagellates
creep with pseudopods

Molecules like glucose and amino acids are not lipid soluble, so cannot cross the cell membrane by simple diffusion. instead, they are shuttled across by carrier proteins in the membrane from high to low concentration. does this process require energy from the cell? this is an example of what type of molecular movement?