Systems Flashcards
Types of membranes
Impermeable membrane, semiPermeable membrane, permeable membrane, selectively permeable membrane
Impermeable membrane
No substance can pass
Semi permeable membrane
Only solvents like water can pass
Permeable membrane
Solvents and solutes like ions and molecules can pass
Selectively permeable membrane
Let’s some specific solute’s and blocked others and allows solvents
What are cell membranesI made of
They are made out of proteins phospholipids and cholesterol
Does cholesterol do
It repels water and it stops cell membranes from being to fluid
What is water loving and water heating in the membrane and what are the words for it
Hydrophilic but it heads, hydrophobic fatty acid tails
Fluid Mosaic model and why It’s called that
The Appearance of the cell membrane is known as the fluid Mosaic model the term fluid is used because the phosphate molecules and proteins that make up the membrane are free to drift around enough fluid motion. The term Mosaic is used to describe the position of the protein molecules.
Proteins are blank
Integral or intrinsic meaning they Go all the way through the plasma membrane/possible lipid bilayer
Proteins can also be blank
Peripheral which means that they are on the phospholipid hheads
The functions of proteins
Structural support, recognition, communication, transport
Diffusion
Is the tendency of particles to move from one area of high concentration where are more random collisions to an area of lower concentration where there are fewer collisions
Solvent and solute
Solvent is the liquid solute is dissolved in
Osmosis
Is a special kind of diffusion it’s the diffusion of water through a semi permeable membrane such as the cell membrane
Hypertonic solution
Water diffuses out of the cell because the salt concentration is hire out
Hypotonic solution
When the fluid surrounding the cell has a lower solute concentration then that found in the cytoplasm of the cell water diffuses into the cell by osmosis
Isotonic solution
The concentration of solute in the fluid surrounding the cell is the same as it is in the cell cytoplasm. Equilibrium
Active transport
Is the movement of molecules or ions against a concentration gradient
Passive transport
Movement of molecules or ions from an area of higher to lower concentration
Facilitated Diffusion
Facilitated diffusion occurs when molecules enter cells through channels that exist in special transport truck proteins that span the membrane. This happens along the concentration gradient and it’s a form of passive transport. Diabetes glucose insulin
Cardiac output
Amount of blood pumped out of the left ventricle per min.Stroke volume which is the amount of blood pumped out per beep multiplied by the heart rate which is the number of times the heart beats per minute
