Which statement about the cytoskeleton is true?

Microvilli are found

(a) Mostly in muscle cells

(b) On the inside of plasma membranes

(c) In large numbers on cells that secrete hormones

(d) In cells that are actively engaged in absorption

(e) Only on cells lining the reproductive tract

What component of the cytoskeletons do motor proteins use to transport vesicles?

In human cells, ___________________ are used to move a cell within its environment while ___________________ are used to move objects in the environment relative to the cell.

What effect would the hypothetical poison of question 3 have on other functions of the cell? Explain.