biology a (workbook 13.1-workbook 13.3)

What is true for both endocytosis and exocytosis?

Both require energy

What problem with the CFTR protein causes cystic fibrosis?

The CFTR protein cannot pump ions out. This means water cannot move out of the cell. The result is very thick mucus.

Study the image below, which shows how the sodium-potassium pump works. © 2017 StrongMind Long Description Identify the error in the image.

The pump is powered by an ATP molecule. The ATP molecule should be located in the cytoplasm, not outside the cell, as shown.

workbook 13.1

active transport

workbook 13.3

endocytosis and exocytosis

workbook 13.2

sodium-potassium pump

What is endocytosis?

the energy-using process in which macromolecules are taken into the cell

Why does active transport require energy?

to move substances against their concentration gradient

The sodium-potassium pump is an example of active transport. True or False?

true