5.1 Mid-Lesson Check in

Passive transport moves molecules from low to high concentration.

• True

• False

Which of the items listed below help materials cross the membrane?

• proteins

• cholesterol

• water modules

• carbohydrates

Solutes enter a cell when the solution surrounding that cell is

• weak

• hypotonic

• concentrated

• hypertonic

Unlike passive transport, active transport requires...

• vessicles

• energy from the cell

• concentration gradients

• diffusion

The process of removing waste from a cell is called

• endocytosis

• hypotonic

• isotonic

• exocytosis

The movement of molecules into a cell through transport proteins in the cell membrane is a type of...

• selective transport

• osmosis

• facilitated transport

• exocytosis

When active transport is moving molecules, it will allow molecules to move from...

• high to low concentrations

• low to low concentrations

• low to high concentrations

• high to high concentrations

If the extracellular fluid surrounding a cell is hypotonic, then the cytoplasm within the cell is hypotonic.

• True

• False

A membrane-bound sac, called a ________________, is used to transport substances into and out of cells.

• vessicle

• pump

• lysosome

• macrophage

Which process uses proteins to move molecules against a concentration gradient?

• phagocytosis

• active transport

• endocytosis

• passive transport