Cell Membrane- unit 3 Flashcards
The cell membrane provides ____________ to the cell from its surroundings.
protection
The cell membrane helps maintain _______________.
homeostasis
The cell membrane is _____-_________ to allow materials in or out as needed.
semi-permeable
What 2 things is the cell membrane composed of?
phospholipids and proteins
The phospholipids are arranged in a bilayer with ____________ heads and ____________ tails.
hydrophilic, hydrophobic
What does hydrophilic mean?
water-loving
What does hydrophobic mean?
water-hating
Homeostasis is also referred to as _________ _____________.
selective permeability
What allows materials to move in and out of the cell?
Proteins
What do channel proteins form?
Form a tunnel
Carrier proteins _______ shape and are also called protein _______.
change, pumps