Honors Cell Transport

What types of molecules are able to easily slip through the phospholipids?

• Small, non-polar, non-charged molecules (O2, CO2)

• Slightly bigger, charged ions (Na+, Cl-)

• Large macromolecules (proteins)

• Water

What types of molecules require the use of transport proteins (2 answers)

• Non-polar molecules such as O2

• Large molecules like lipids

• Polar, slightly larger molecules like glucose

• Small ions like Na+

What type of molecules would require the use of transport vesicles?

• Large molecules like proteins

• Charged molecules like K+

• Small ions such as Na+

• Water

Osmosis is the diffusion of water. If a solution has a low concentration of solute, it must have:

• A low concentration of water

• The same concentration of water

• A higher concentration of water

• There is no relationship between solute concentration and water

During osmosis, water will move from an area containing a low concentration of SOLUTE to an an area containing...

• only the solute

• a high concentration of WATER

• a high concentration of SOLUTE

• the same amount of solute

Molecules such as oxygen and carbon dioxide utilize ___________ in living cells

• Active transport; exocytosis

• Passive transport; facilitated diffusion

• Passive transport; diffusion

• Active transport; endocytosis

Tags

NGSS.HS-LS2-5

Which statement is NOT true about passive transport?

• Molecules move down/with the gradient

• Passive transport does not require energy

• Proteins are sometimes used during passive transport

• Endocytosis and Exocytosis are examples of passive transport

Slightly bigger, polar, charged ions must use ___________ during __________.

• phospholipids; diffusion

• transport proteins; facilitated diffusion

• diffusion; osmosis

• pumps/vesicles; active transport

Which is NOT an example of active transport?

• Endocytosis

• Exocytosis

• Sodium-potassium pump

• Osmosis

The cell membrane is selectively permeable (semipermeable). What is the function of the cell membrane?

• Manage the cell's energy supply

• Control the shape of the cell

• Regulate temperature

• Control what enters/leaves the cell

Tags

NGSS.HS-LS1-3