Smartbook 5 Part 3 Flashcards
Transport proteins that have a hydrophilic interior space with an aqueous environment through which specific sub can move across the membrane in either direction are called
Channel proteins
How do carrier proteins differ from channel proteins
Only carrier proteins actually bind to the sub being transported
Why do ions need membrane transport proteins to help them cross the plasma membrane
Because they are charge
What are the true statements about ions channel
Some can be opened or closed in response to be specific stimulus
They are used to transport ions across the membrane
What is true of channel proteins
They have a hydrophilic interior through which polar molecules can pass
Cations have
A positive electric charge
Have an unequal number of protein and electrons
Of the 2 types of transport proteins that mediate facilitated diffusion, only_____ proteins actually bind with the sub being transported while _______ proteins simply provide a hydrophilic space for the sub to move through
Carrier; channel
True statement of gated ion channels
Gate that open and close in response to diff stimuli
Hydrated interior through ions can move the channel is open
Ion _____ have a hydrated interior that spans the membrane and allows ions to diffuse through
Channels
Transport proteins that have a hydrophilic interior space with an aqueous environment through which specific sub can move across the membrane in either direction are called ______ proteins
Channel
What are transported across membranes by carrier proteins
Ions
Sugars
Amino acids
Channel proteins that can be opened or closed in response to a specific stimulus are called _____
Gated channels
All sub move across the plasma membrane of red blood cells by diffusion
What is move by facilitated diffusion
Glucose
Chloride ions
Bicarbonate ions
