cell membrane common assessment 2018

In active transport, carrier proteins…

• Move substances across the cell membrane without the use of ATP

• Move from low to high concentration by diffusion

• Move small molecules through the cell membrane by osmosis

• Move substances from a low concentration to a high concentration through the use of energy

The diagrams show four different cells in solutions of particles. The dots represent particles.

The cell membranes of the cells are permeable to water but not to the particles. Which cell will swell after being placed in the solution?

• A

• B

• C

• D

Which of the diagrams above represents a cell in an isotonic solution?

• A

• B

• C

• D

A white blood cell engulfs a bacterium, taking it in and then destroying it. What type of movement has occurred?

• Endocytosis

• osmosis

• facilitated diffusion

• equilibrium

A diagram of a cell membrane is shown. What type of transport is represented?

• Endocytosis

• osmosis

• facilitated diffusion

• equilibrium

Diffusion is the movement of particles from …

• an area of low concentration to an area of high concentration.

• an area of high concentration to an area of low concentration.

• an area of equilibrium to an area of high concentration.

• all of the above

Which type of cellular transport moves Na⁺ and K^- through a cell membrane?

• Facilitated transport

• Active transport

• Diffusion

• Osmosis

Which of the following diagrams represents active transport?

• A

• B

• C

• D

The process where a substance in a cell moves from an area of higher concentration to an area of lower concentration without an input of energy is called…

• Active transport

• A sodium pump

• passive transport

• semipermeability

If the concentration of a solute differs across a membrane permeable only to water, water will move across the membrane by…

• facilitated transport

• phagocytosis

• osmosis

• active transport