Cell Bio review exam 3

lipid bilayer

• forms spontaneously

• amphipathically

• requires energy to form

• does not require energy to form

Which motion requires energy

• lateral diffusion

• flip flop

• rotation

• flexion

Phosphotidocoline

• mainly found on the inside

• mainly found on the outside

• important for structure

• important for signaling

Wich membrane protein is hydrophilic and attached to a lipid in the membrane

• monolayer associated

• protein linked

• transmembrane

• lipid linked

Having molecules farther apart on the membrane

• makes signaling go slower

• makes signaling go faster

• has no effect on the signal

The carbohydrate layer

• important for identity (uniforms)

• provides protection by making it slimy

• coats the surface of the cell

• is found inside the cell

channel-mediated proteins

• are selective

• takes a very small amount of proteins at a time

• is like a "turnstile"

• are passive transport

Where are the concentration for sodium and potassium high

• They are both high on the outside

• Sodium is high in concentration on the inside and Potassium is high on the outside

• Sodium is high in concentration on the outside and Potassium is high on the inside

• They are both high on the inside

Ca2+

• very high concentration on the outside

• has no large impact on the body

• very low concentration on the inside

• the most tightly regulated ion in the body

The Sodium Potassium Pump

• pumps 3 Na+ in and 2 K+ out of the cell

• both ions are going against the concentration gradient

• is an active transport

• pumps 3 Na+ out and 2 K+ in the cell