Moving Materials

Which of the following describes a state of equilibrium?

• When water molecules have stopped moving or vibrating 

• When the concentration of water outside a cell is the same as the concentration of water inside a cell 

• When a cell with a lot of water in it continues to absorb water 

The cell membrane is semi-permeable. What does "permeable" mean?

• Extremely thick

• Extremely thin

• Able to be penetrated 

The movement of substances from an area of higher concentration to an area of lower concentration

• diffusion

• osmosis

• cellular respiration

Tags

NGSS.MS-LS2-3

The diffusion of water molecules only through a membrane 

• diffusion 

• osmosis

• facilitated diffusion 

What process is shown in the image?

• endocytosis

• active transport

• facilitated diffusion

• exocytosis

What keeps cells from growing too large?

• If a cell gets too large, there is not enough energy available for active transport

• If a cell gets too large, there is not enough energy available for active transport

• If the surface-area-to-volume ratio is too small, not enough nutrients can move across the membrane.

• If a cell gets too large, there is not enough energy available for passive transport.

This type of transport is passive.  It uses a transport protein to help move materials across the cell membrane.

• diffusion

• osmosis

• facilitated diffusion

• pumping

The movement of WATER across a selectively permeable without the use of energy is called

• active transport

• osmosis

• diffusion

• endocytosis

Transport proteins that carry large molecules,such as sugar molecules, through a cell membrane

• carrier proteins 

• transport proteins

• channel proteins

Substances too large to pass through the cell membrane enter the cell in a process called_________.

• exocytosis

• passive transport

• endocytosis

• active transport