Passive Transport

According to the fluid mosaic model, the cell membrane is primarily made up of-

• Carbs and Proteins

• Lipids and Proteins

• Nucleic Acids and DNA

• Carbs and Lipids

Which of the following is a function of the cell membrane?

• A rigid structure that provides shape to the cell

• To make proteins that are carried by vesicles

• To store the genetic information for the cell

• To control what enters and exits the cell to maintain homeostasis

Tags

NGSS.HS-LS1-3

Which statement best describes passive transport?

• The movement of molecules from a high to low concentration without energy

• The movement of molecules from low to high concentration without energy

• The movement of water against the concentration gradient

• Passive transport requires ATP energy to go against the gradient

Osmosis is the movement of _______ from a high concentration to a low concentration.

• Glucose

• Sodium

• Water

• Smell

Tags

NGSS.MS-LS2-3

Which claim is supported by this osmosis image?

• There is an equal amount of water movement inside and outside the cell

• Water is moving out of the cell because the solute concentration is higher outside than inside

• Solutes are moving into the cell to balance it inside and outside

• None of these correctly describe the image

Tags

NGSS.HS-LS1-3

Which way will the water move in this solution?

• Water does not move into cells

• the same rate in and out

• Out of the cell

• Inside the cell

Tags

NGSS.MS-LS1-2

Passive transport moves from a _______ concentration to a ________ concentration.

• high to low

• high to high

• low to high

• low to low

Passive transport requires the use of ATP energy to go against the concentration gradient.

• True

• False

Which statement is best supported?

• diffusion of molecules from a high to low concentration

• a protein channel moves molecules from high to low concentration

• Water is being moved across the membrane from low to high

• Na (sodium) is being selectively tansported

The cell membrane is made up of lipids and proteins; what is the function of proteins in the cell membrane?

• to transport lipid insoluble materials across the membrane

• To provide structure for the cell

• To keep out materials too large to diffuse into the cell

• Proteins do nothing for the membrane

Tags

NGSS.MS-LS1-2