parts of cell 1 Flashcards
what is a cell
is the basic structural and functional unit of the body
the cell membrane is formed by ?
phospholipids with two legs, one is saturated and the other one is unsaturated, the head is hydrophilic and is made up of a glycerol and a phospholipid
glycocalyx
around the cell, biofilm (glue like ), helps cell with cell communication, made up of glycoproteins
ion channel
integral, helps move ions across the water filled pore
carrier/transporter (integral)
helps transport specific substances across membrane by changing shape
ligand receptor
binds to cell membrane and alters cell function
enzymes (integral and peripheral)
catalyzes reactions inside or outside the cell( depending on which direction the active site is facing )
skeletal anchor (integral, peripheral)
maintain structure of cell and can also link to other cells
cell identity markers (glycoprotein)
this is unique to your cells unless you are an identical twin. Major histocompatibility is MHC
membrane features are ?
-semipermeable
-bilayer forms and reseals spontaneously
-flip- flop of molecules are rare except cholesterol
-electrochemical gradient from across bilayer
intercellular communication
electrical gradient
the ECF is more positive due to K+ leaking out of the cell
what’s the electrochemical gradient in the blood
Na+ 142 mEq/L to K+3.5 meq/L,
what’s the electrochemical gradient intracellular
K+ 150 mEq/L to Na+ 10 mEq/L
chemical gradient
Na+ likes to go inside the cell, due to a higher concentration of NA+ outside the cell.
potential membrane
the voltage exist across the membrane due to diff charge of + and -
