Biology

What supplies the energy for active transport

ATP

What allows a cell to stockpile substances in far greater concentrations than they occur outside the cell

Active Transport

Heavy rain is to Flooding

As concentration difference osmosis

Differences and similarities between facilitated diffusion and active transport

Both use carrier proteins, active transport against the gradient, facilitated diffusion with the gradient

Explain facilitated diffusion In respect to the concentration gradient

Carrier protein changes shape to allow things in and out

What is dynamic equilibrium

Continuous movement but no change

What is a concentration gradient

Difference in concentration on either side of the membrane

Which of the following does not require an expenditure of energy: diffusion, active transport, endocytosis, or the sodium-potassium pump

Diffusion

What is the end result of diffusion

Eventually the concentration becomes balance on both side of the membrane

How do sugar molecules enter and leaves cells

Facilitated diffusion

Provide an example of passive transport

Facilitated diffusion

Sugar molecules enter

Facilitated diffusion

What is the major difference between facilitated diffusion and active transport

Facilitated diffusion goes with the gradient(high to low)and active transport doesn't do with gradient(low to high)

Distinguish facilitated diffusion from active transport

Facilitated high to low no energy, active transport- low to high need energy

Explain how diffusion takes place in accordance with the concentration gradient

From an area of high to low concentration

List type of molecules that enter the cell by means of facilitated diffusion

Glucose and amino acids

Describe how drop of dye illustrates the process of diffusion

High to low conentration

Tonicities

Hypotonic-cell swells Hypertonic- cell shrinks Isotonic-cell remains the same size

What happens to a plant cell when it is placed in a hypertonic environment

It causes turgur pressure to decrease

What in endocytosis

Large molecules enter the cell

What types of materials are expelled from cells during exocytosis

Large molecules like hormones

What is solubility

Materials that are soluble in lipids can pass through the cell membrane easily how things dissolve

Define diffusion and example

Molecules move high to low concentration, drop of dye in a beaker

Explain how carrier proteins proteins work in facilitated diffusion

Move in and out

Why is it dangerous for humans to drink ocean water (Essay)

Ocean water contains high concentration of salt, to much salt causes hypertonic situation and cells will be dehydrated

Define phagocytosis and pinocytosis

Phagocytosis- cellular eating pinocytosis- cellular drinking

List types of molecules that enter the cell by means of active transport

Potassium ion, large sugars, large proteins

Describe how the sodium potassium pump works

Pumps sodium ions out and potassium ions in, how your nerve impulses work

What helps nerve impulses occur

Sodium potassium pump

Explain a specific example of how ions are transported across cell membranes

Sodium potassium pump sends electrical signal to let ions move

What is osmosis

The diffusion of water across the cell membrane from high to low

What is exocytosis

The existing of large molecules

If add salt to a cell, diffusion takes place because

There is a concentration gradient, water will diffuse out of a cell so the cell reaches equilibrium

What happens to algal cells when they are in isotonic solutions and solutes are added to the solutions

They will shrink

What happens to a plant cell when it is a hypotonic solution

Turgur pressure to increase in the large central vacuole

List types of molecules that enter and leave the cell by means of simple of diffusion

Water, oxygen, carbon dioxide

Are ions channels specific

Yes specific for ions, calcium channel allows calcium