CELL MEMBRANES A-LEVEL BIOLOGY

Movement of substances from a region of higher concentration to a region of lower concentration is known as ________________________

• Diffusion

• Active transport

• Phagocytosis

Which is true about active transport?

• It requires energy
• it does not require energy
• It moves substances down the concentration gradient
• it moves material from high to low concentration

Which of the following substances passes through the plasma membrane   through the process of osmosis?

• glucose
• water
• protein
• sodium

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

• active transport
• endocytosis
• passive transport
• phagocytosis

When cells form a vesicle to release materials, which form of transport is occurring? 

• Endocytosis
• Exocytosis
• Facilitated Diffusion
• Osmosis

The sodium-potassium pump requires energy to move ions across the cell membrane against their concentration gradient so it is a type of.....

• active transport

• osmosis

• diffusion

• facilitated diffusion

The picture is an example of _________________.

• osmosis

• facilitated diffusion

• diffusion

• active transport

Some molecules need the help of membrane proteins to move molecules from areas of high concentration to areas of low concentration.

• active transport

• facilitated diffusion

• diffusion

• osmosis

Energy for active transport comes from the cells

• Golgi complex

• mitochondria

• nucleus

• lysosome

All of the following are types of passive transport except

• facilitated diffusion

• simple diffusion

• osmosis

• endocytosis