8.3 Cell Transport-Diffusion

8.3 Cell Transport-Passive Transport

Homeostasis

• Constant Physical/Chemical State

• What Your Body is Use To

• Membrane Regulates Movement

Passive Diffusion

• No Energy Required

• High to Low Movement

• Continuous Movement Until Net Movement is Equal*

• No Special Channels Needed

Facilitated Diffusion

• No Energy Needed

• High to Low Movement

• Go Through Special Channels

• Molecules Too Large to Fit w/o Help

Multiple Choice

Diffusion is the movement of molecules from an area of _____ concentration to an ______ concentration

• High, low

• Low, high

• Low, low

• High, high

Multiple Choice

When does diffusion stop?

• After a day and a night

• When the particles are evenly spread out

• When there are no particles left

• When all the particles leave the system

Multiple Choice

What does a 'region with high concentration' mean?

• An area with a SMALL number of particles

• An area with a LARGE number of particles

• An area with an UNEVEN number of particles

• An area with no particles

Multiple Choice

The movement of particles is __________, resulting in the particles being spread throughout the container

• Structured

• In a straight line

• Random

• In curved, way motions

Multiple Choice

How do the particles move in diffusion?

• From a region of low concentration to a region of high concentration

• From a region of high concentration to a region of low concentration

• From a region of low concentration to a region of low concentration

• From a region of high concentration to a region of high concentration

Multiple Choice

What is a solvent

• The one doing the dissolving

• The substance dissoved in another substance

Multiple Choice

What is a solute?

• A substance dissolved in another substance

• the substance doing the dissolving

Multiple Choice

What is a difference between diffusion and facilitated diffusion?

• movement of particles from [high] to [low]

• a protein "helper"

• movement of particles from [low] to [high]

• energy

Multiple Choice

What is the movement of particles with the concentration gradient using protein "helpers"?

• diffusion

• facilitated diffusion

• active transport

• enzymatic reactions

Multiple Choice

An example of diffusion is

• CO₂ and O₂ exchange in the lungs

• Glucose transport

• Na⁺ / K⁺ Pumps

• Exocytosis

Multiple Choice

Passive Transport uses ____ energy

• no

• a lot of

• a little bit of

• some

Multiple Choice

Diffusion & Facilitated Diffusion are both __________ transport.

• Passive

• Active

• Easy

• Free

Multiple Choice

Diffusion & Facilitated Diffusion are both __________ transport.

• Passive

• Active

• Easy

• Free

Osmosis

• Facilitated Diffusion of Water

• Aquaporins-Protein Channels

• Water Can Move But Solute Can't

• Solute-Substance that Dissolves

• Sugar/NaCl Would Be the Solute

• Solids can't move thru membrane​

• Solvent-The solute dissolves into It

• Liquid* part of the solution​

• Water is the Universal Solvent

Isotonic

• Water % is the same on the outside as the Water % inside

• Zero NET Movement

• Normal Cell Size

• Optimal size for Cell Functions​

Hypotonic = Hippo Cheeks

• Higher Water on Outside 95%

• Lower Solute (NaCl) on Outside​ 5%

• ​Lower Water on the Inside 20%

• Higher Solute (NaCl) on Inside 80%

• Water will enter the cell = Bigger Cell

  Only the Water can move NOT the NaCl

• Bloated cells not as effective​

Hypertonic = Hyper Kid

• Higher Water % on the Inside 85%

• Lower Solute (NaCl) Inside 15%​

• Lower Water % on the Outside 10%

• Higher Solute (NaCl) Outside 90%​

• Water will leave the cell = Shrink

• Only the Water can move NOT NaCl

• Dehydrated cells not as effective ​

Multiple Choice

The cells seem to be shriveled and dehydrated what type of solution are they most likely in?

• Hypertonic
• Isotonic
• Hypotonic
• Inertonic

Multiple Choice

Which cell is in an isotonic environment?

• A

• B

• C

• None of them are isotonic

Multiple Choice

Which cell is in a hypertonic environment?

• A

• B

• C

• None of them are hypertonic

Multiple Choice

Where is there a low concentration of dye?

• at the bottom of cup
• in the color
• at the top of cup 
• no concenteraion gradient

Multiple Choice

During osmosis

• water moves from high to low concentration
• large or oddly shaped molecules move across a cell membrane
• water moves when energy is used
• proteins are built

Multiple Choice

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

Multiple Choice

A blood cell is placed into the jar, as seen. Where will the water go?

• Into the cell
• Out of the cell
• Equally in & out - it's isotonic
• The water is a lie

Multiple Choice

Where will the water go?

• Into the cell

• Out of the cell

• Equally in & out - it's isotonic

• There is no water

Multiple Choice

Where will the water go?

• Into the cell

• Out of the cell

• Equally in & out - it's isotonic

• There is no water