Cell Bio Chapter 8

The central aspect of cell function is

• Selective transport

• Chemical Energy

• Integral Proteins

• Selective Permeability

Most of the substances that move across membranes are dissolved which makes them

• Soultes

• Solvents

• Isotonic

• Hypotonic

• Hypertonic

The process by which cells are able to regulate concentrations of substances that are very different from their surroundings

• Regulation

• Diffusion

• Homeostasis

• Active Transport

The movement of a molecule with no net charge is determined by

• Carrier Proteins

• Concentration Gradient

• Active Transport

• Channel-mediated Transport

Simple diffusion and facilitated diffusion involve ________ movement

• Upward Movement through Gradient

• Endergonic

• Random

• Exergonic

Active transport involves __________ movement

• Exergonic

• Endergonic

• Random

• Positive

Exergonic Movement has a ______ Gibbs Free Energy

• Positive

• Negative

Endergonic movement has ________ Gibbs Free Energy

• Positive

• Negative

What is combined to create the concept of electrochemical potential

• Polarity

• Concentration

• Direction of movement

• Charge gradient

Movement of an ion is determined by