Cell Transport Lesson

What is the driving force behind the movement of many substances across the cell membrane?

• Facilitated Diffusion

• Osmosis

• Diffusion

• Homeostasis

What is the movement of molecules across the cell membrane without using cellular energy is called

• Active Transport

• Passive Transport

• Osmosis

• isotonic

What is the movement of materials against a concentration difference is known as

• Passive transport

• Molecular transport

• Bulk transport

• Active transport

A molecule that diffuses down a concentration gradient goes from an area of ______ concentration into an area of ______ concentration.

• high, low

• low,high

• active, passive

• passive,active

​​ (a)   , (b)   , and ​ (c)   are both types of active transport. Active transport moves materials ​ (d)   the concentration gradient.

• ion pump

• endocytosis

• exocytosis

• against

• with

• energy

• osmosis

• diffusion

Answer explanation

You may have gotten them correct but out or order, sorry but there is only one answer per space.

1. T/F: In passive transport, the movement of particles across a membrane requires energy. (a)  

2. T/F: Endocytosis is a process by which a cell membrane surrounds and takes in material from the environment.​ (b)  

3. T/F: A membrane that allows only some materials to pass through shows selective permeability. ​ (c)  

• False

• True

​ (a)   ​ (b)   and ​ (c)   are all types of ​ (d)  

• diffusion

• osmosis

• facilitated diffusion

• passive transport

• endocytosis

• exocytosis

What is the main difference between passive transport and active transport?

• Passive transport moves molecules from a low to high concentration, while active transport moves them from high to low concentration.

• Active transport requires cellular energy, while passive transport does not.

• Passive transport can only move water molecules, while active transport can move any type of molecules.

• Active transport uses vesicles, while passive transport uses the cell membrane.

What is passive transport?

• The movement of molecules across the cell membrane without the use of energy by the cell.

• The movement of molecules across the cell membrane using energy.

• The process of taking material into the cell by means of infoldings, or pockets, of the cell membrane.

• The release of materials from the cell.

In ​ (a)   , materials move with the concentration gradient without assistance. In ​ (b)   , materials also move with the concentration gradient but they need the assistance of a carrier protein.

• simple diffusion

• facilitated diffusion