The fundamental unit of Life: Cell membrane

Basic unit of all forms of life

• Cell

• Nucleus

• Prokaryote

• Eukaryote

Tags

NGSS.MS-LS1-1

The cell membrane is mostly made of what?

• Membrane-spanning Proteins

• Surface Proteins

• Phospholipids

• Carbohydrates

Tags

NGSS.MS-LS1-2

What are the two parts of a phospholipid?

• head

• enzyme

• tail

• hormone

Tags

NGSS.MS-LS1-2

What forms due to a difference in concentration of particles on opposite sides of the membrane?

• concentration flow

• concentration gradient

• equilibrium

• diffusion gradient

Tags

NGSS.HS-PS1-5

Particles move across the membrane ___________ attempting to reach equilibrium.

• orderly

• slowly

• randomly

• in a single file line

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NGSS.MS-LS2-3

The phospholipid head is _____________ & _____________

• Hydrophilic

• Hydrophobic

• Polar (+)

• Uncharged

Define plasma membrane

• lipid that helps minimize effects of temperature

• only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers

• flexible boundary of a cell that separates a cell from its surroundings

• may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face

Tags

NGSS.MS-LS1-2

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?

• the phosphate "head"

• the lipid "tails"

Where can PROTEINS be found when part of a plasma membrane?

• On the outside of the membrane

• On the inside of the membrane

• Embedded part of the way into the membrane

• Embedded the whole way through the membrane

• All of the above

Tags

NGSS.MS-LS1-2

What is the "big idea" of the fluid mosaic model of plasma membranes?

• the plasma membrane creates a specialized FLUID that looks like a MOSAIC.

• the plasma membrane is a MOSAIC.

• the fluid mosaic model is NOT related to the plasma membrane.

• a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.