cell transport

Where does cell transport begin?

Cell membrane

What does the cell membrane do?

Regulates the transport of materials in and out of the cell & helps maintain homeostasis

What is the structure of a phospholipid?

One phosphate head and two lipid tails

Is the head hydrophilic & polar or hydrophobic & nonpolar?

hydrophilic & polar

Is the tail hydrophilic & polar or hydrophobic & nonpolar?

hydrophobic & nonpolar

How many layers come together in the phospholipid bilayer?

2

Where are Transport proteins found?

Plasma membrane

What are the 2 types of transport proteins?

Carrier and channel proteins

Does passive transport require energy?

No

Does active transport require energy?

Yes

Which direction does passive transport move in the concentration gradient?

Down (high to low)

What is simple diffusion?

The random movement of molecules from high to low concentration

What is a solute?

The stuff in a solution

What is an example of a solute?

Salt

What is a solvent?

The liquid in a solution

What is an example of a solvent?

Water

What is a solution?

Solute + solvent

What is osmosis?

The movement of water across semipermeable membrane due to differences in solute concentration

Does simple diffusion use proteins?

No

Does facilitated diffusion use proteins?

yes

What is facilitated diffusion?

Passive transport using proteins embedded in the membrane

What are channel proteins?

Proteins that form channels to allow molecules to flow through

What are carrier proteins?

Proteins that change shape, allowing a substance to pass through

Which types of transport use proteins?

Facilitated diffusion and active transport

What is active transport?

Movement of material through membrane against a concentration gradient