4.1 Passive Transport

Cells and Their Environment

by Curt Mathis

Multiple Choice

The cell membrane is mostly made of what 2 biomolecules?

• Lipids and Nucleic acids

• Protein and Nucleic acids

• Carbohydrates and lipids

• Lipids and Proteins

Multiple Choice

What is diffusion?

• when molecules move from a low concentration to a high concentration 

• when molecules move from a high concentration to a low concentration.

• no movement 

• molecules move everywhere

Multiple Choice

Equilibrium?

• a large  amount of substance on  side of the cell and a small amount on the other side

• a small  amount of substance on  side of the cell and a large amount on the otherside

• equal amount of substance on either side of the membrane  

• no particles on either side of the a cell membrane

Multiple Choice

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)

Multiple Choice

_______ regulates what enters and leaves a cell.  

• Cell Membrane

• Nucleus

• Mitochondria

• Cytoplasm

Multiple Choice

Passive Transport means

• Energy is used

• No energy is used

• Energy is created

Multiple Choice

Osmosis

• diffusion of water molecules through a semi-permeable mebrane from an area of low concentration to an area of high concentration

• the diffusion of particles from an area of high concentration to an area of low concentration

• diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration

• the diffusion of particles from an area of low concentration to an area of high concentration

Multiple Choice

What type of solution is shown in the picture?

• Hypertonic

• Hypotonic

• Isotonic

Multiple Choice

Shrinking an object by removing water is an example of 

• hypotonic solution

• hypertonic solution

• isotonic solution

• active transport

Multiple Choice

what type of solution causes the blood cells to swell and burst.

• hypotonic solution

• hypertonic solution

• isotonic solution

• active transport

Multiple Choice

this picture show the molecules getting help across the membrane.  the vocabulary word that best describes this is

• diffusion

• osmosis

• facilitated diffusion

• active transport