Cells and Environment Review 2

Which of the following is the moving of substances from high concentrations to low concentrations?

• active transport

• passive transport

• endocytosis

• sodium-potassium pump

Which of the following is the movement of substances from low concentrations to high concentrations using energy?

• passive transport

• active transport

In ___________________________, small, non polar substances pass directly through the cell membrane

• facilitated diffusion

• simple diffusion

• endocytosis

• osmosis

What is the definition of  Selective Permeability?

• The movement of materials across the cell membrane that requires NO ENERGY from the cell.
  
• The movement of materials through (or across) the cell membrane
  
• The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
• The movement of molecules from an area of high concentration (where the molecules are more crowded together) to a area of low concentration (where molecules are more spread apart)
  

Tags

NGSS.MS-LS1-2

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

Tags

NGSS.MS-LS2-1

An animal cell placed in a hypertonic (salty) solution will

• Shrink
• Swell
• Stay the same

Tags

NGSS.HS-LS1-3

A cell is placed in a pure water solution. This would be a hypotonic environment. What happens to the cell?

• the cell will fill with water

• the cell will lose water and shrink

• the cell will stay the same size

Which part of the cell membrane identifies the cell?

• phospholipid bilayer

• carrier proteins

• receptor proteins

• cell-surface marker

By controlling what enters and leaves a cell, the cell membrane

• aids in maintaining homeostasis within the cell

• aids in maintaining homeostasis outside of the cell

• aids in maintaining osmosis within the cell

• aids in maintaining osmosis outside of the cell

Movement into the cell by means of a vesicle is

• endocytosis

• exocytosis

• sodium-potassium pump

• osmosis