Cell Membrane Vocabulary

What is Homeostasis?

• The process by which cells divide

• When a living organism self-regulates and maintains internal stability while making adjustments to the external environment

• The energy production in cells

• The movement of water across a cell membrane

Tags

NGSS.HS-LS1-3

What does the Phospholipid Bilayer consist of?

• A single layer of phospholipids

• Proteins and carbohydrates

• 2 layers of a phosphate and a lipid that makes up the cell membrane

• Cholesterol and proteins

What does the Fluid Mosaic Model describe?

• The rigid structure of the cell wall

• The dynamic and flexible nature of the cell membrane

• The solid state of cellular fluids

• The pattern of movement of cytoplasm

Which molecules are considered hydrophobic?

• Water loving molecules

• Molecules with no charge

• Water fearing molecules, for example, tails of the phospholipid

• Molecules where one end has a positive charge and the other end has a negative charge

What is the role of cholesterol in the cell membrane?

• It forms hydrophilic pores across the cell membrane

• It helps the immune system

• It is a fat-like waxy substance that helps shape the cell membrane

• It allows smaller particles to pass through the membrane but not larger ones

What is the function of glycoproteins in the cell membrane?

• They form hydrophilic pores across the cell membrane

• They help the immune system

• They maintain stability in the cell membrane

• They allow smaller particles to pass through the membrane but not larger ones

What is the characteristic of a semipermeable membrane?

• It allows all particles to pass through the membrane

• It prevents any particles from passing through the membrane

• It allows smaller particles to pass through the membrane but not larger ones

• It only allows charged particles to pass through the membrane

What characteristic allows polar molecules to dissolve in water?

• They have a neutral charge.

• They are larger than water molecules.

• One end has a positive charge and the other end as a negative charge.

• They are hydrophobic.

What is characteristic of a nonpolar molecules?

• they are larger than water molecules

• they have a neutral charge

• they have no charge

• they are hydrophilic

Which of the following is an example of a nonpolar molecule?

• Water (H2O)

• Table salt (NaCl)

• Methane (CH4)

• Ammonia (NH3)