TRANSPORT MECHANISMS IN THE CELL Flashcards
It is an individual’s collection of chromosomes
Karyotype
What do you call to the 1st – 22nd pair of chromosomes
autosomes
What do you call to the 23rd pair of chromosomes in the body
sex chromosomes
Define selectively permeable
a membrane that allows only some substances and molecules to pass into or leave the cell
It is the most important feature of cell membrane
class of lipids whose molecule has a hydrophilic “head” containing a phosphate group, and two hydrophobic “tails”
Phospholipids
Is head hydrophilic or hydrophobic?
Hydrophobic- “ water fearing”.
Is tail hydrophilic or hydrophobic?
Hydrophilic- “Water loving”
It describes the cell membrane as a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving.
FLUID MOSAIC MODEL
It refers to the movement of substances across the cell membrane.
Cell transport
It does not require energy in cell transport
PASSIVE TRANSPORT
IT requires ENERGY in cell transport
ACTIVE TRANSPORT
the particle or substance moves from higher to lower concentration
Simple Diffusion
It is a process by which the molecules of a solvent pass from a solution of low concentration to a solution of high concentration
Osmosis
movement of large or charged molecules via channel proteins.
Facilitated Diffusion
movement of water molecules through the membrane
Osmosis
