Biology Unit 7

_______ regulates what enters and leaves a cell.

Cell membrane

"Water Loving"

Hydrophilic

___________ form the two layers of the cell membrane.

Phospholipids

What happens if you place pure water into your bloodstream?

The cells undergo lysis (Breaking open)

Active transport across a cell membrane from low to high concentration, requires

ATP (energy)

What type of cell transport it is? -Moves low to high

Active Transport

What type of transport is it? - Requires energy - Uses membrane pump - Moves low to high

Active Transport

How do the particles move in diffusion?

From a region of high concentration to a region of low concentration

A phospholipid has 2 parts. What are they called?

Hydrophilic Head, Hydrophobic Tail

"Water Fearing"

Hydrophobic

. A solution contains 60% water and 40% solute while a cell placed in the solution has 80% water and is 20% solute. What is the tonicity of the CELL?

Hypotonic

A cell contains 30% water while the extracellular solution it is in contains 50% solute. What is the tonicity of the solution?

Hypotonic

What type of transport is it? - Involves only the movement of water. -Moves from high to low.

Osmosis

Whey do grocery stores mist their produce with water?

Plant cells become turgid which makes the crisper and more attractive to the consumer.

Something is ___________ ____________when some molecules can cross the membrane while others cannot.

Selectively (or Semi) Permeable

How long does diffusion last?

Until the concentration of particles in the system is equal

Large particles (or large quantities of smaller particles) are moved across the cell membrane with the use of energy.

bulk transport

Active transport is the movement of large materials across a cell membrane from ______ to ______ concentration

low to high

small compartment enclosed by a membrane formed during transport of material during endo + exocytosis

vesicles

Osmosis is the movement of _____ across a membrane.

water

A general term for the various types of active transport that move particles into a cell by enclosing them in a vesicle made out of plasma membrane.

Endocytosis

white blood cells engulfing invading bacteria is an example of

Endocytosis

A form of bulk transport in which materials are transported from the inside to the outside of the cell in membrane-bound vesicles that fuse with the plasma membrane.

Exocytosis

What type of transport is it? - Requires no added energy - Requires membrane Protein - Moves high to low

Facilitated Diffusion