Chapter 5 Flashcards
(16 cards)
What does the inside of a cell contain high levels of
Potassium and proteins
What does the inside of a cell contain little of
Sodium and Chloride
What does the outside of a cell contain high amounts of
Sodium and chloride
What does the outside of a cell contain low amounts of
Potassium
Why do the inside and outside of a cells contain different levels
It is what the body wants for it to be in homeostasis
Not equilibrium but homeostasis
Cell membrane
Plays an important role of keeping things on their correct side
Plasma Membrane
Control of exchange of nutrients
Stuff on the outside out, stuff on inside in
Some stuff does have to get across
What is diffusion
The movement of a substance from an area of high substance concentration to an area of low substance concentration due to random thermal molecular motion (no energy, don’t have to add anything more to it)
How does diffusion work
A concentration gradient occurs moving things from the more to the less
What are the factors that can affect diffusion across our membrane
Temperature
Molecular Weight
Surface Area
Gradient
Membrane Premeability
Distance
Temperature Affect
directly proportional
Temp goes up, diffusion rate goes up
Temp goes down, diffusion rate goes down
Molecular Weight Affect
inversely proportional (bigger things move slower)
Big molecules low rate of diffusion
Small molecules high rate of diffusion
Surface Area Affect
Directly proportional
More surface area, better diffusion
The alveoli of our lungs gives us a lot more surface area
Gradient Affect
Directly proportional
Big gradient big diffusion
Small, small diffusion
Membrane permeability Affect
Directly Proportional
Membrane permeable, lots of diffusion
Distance Affect
inversely proportional
Closer, higher diffusion
Farther away lower diffusion
