Cell Transport

Which biomolecule helps LARGE molecules cross the membrane?

• phospholipids

• carbohydrates

• nucleic acids

• proteins

Match the following functions to each biomolecule in the cell membrane:

• phospholipids

• allow small molecules to pass through the membrane

• proteins

• transport LARGE/charged molecules through the membrane

• carbohydrates

• cell recognition

How does the cell membrane help maintain homeostasis in each cell?

• The cell membrane allows all substances to pass through freely

• The cell membrane controls the movement of substances in and out of the cell

• The cell membrane provides energy for the cell

• The cell membrane produces proteins necessary for cell function

Tags

NGSS.HS-LS1-3

Passive transport ​ (a)   require energy because it moves ​ (b)   the concentration gradient, from ​ (c)   .

• does NOT
• does
• with
• against
• high to low
• low to high

Tags

NGSS.MS-LS2-3

Active transport ​ (a)   require energy because it moves ​ (b)   the concentration gradient, from ​ (c)   .

• does NOT
• does
• with
• against
• high to low
• low to high

What is the correct description of the transport in the image?

• small molecules crossing the lipid bilayer (diffusion)

• large molecules crossing through a protein (facilitated diffusion)

• many molecules coming into the cell using a membrane vesicle (endocytosis)

• many molecules coming out of the cell using a vesicle to fuse with the membrane (exocytosis)

What is the correct description of the transport in the image?

• small molecules crossing the lipid bilayer (diffusion)

• large molecules crossing through a protein (facilitated diffusion)

• many molecules coming into the cell using a membrane vesicle (endocytosis)

• many molecules coming out of the cell using a vesicle to fuse with the membrane (exocytosis)

Facilitated diffusion and protein pumps are similar because

• They both require energy to function
• They both move molecules from high to low concentration
• They both involve the movement of molecules through proteins

• They both can only move molecules in one direction

Facilitated diffusion and protein pumps are different because

• Both move movement of molecules from high concentration to low concentration

• Facilitated diffusion requires energy while protein pumps do not
• Protein pumps require energy while facilitated diffusion does not
• Both move molecules from low to high concentration

Using the image, choose the correct form of transport and explanation of how you know:

• Active transport, because the molecules are crossing the membrane using a protein

• Passive transport because the molecules are crossing the membrane using a protein

• Active transport because the molecules are moving from low to high concentration

• Passive transport because the molecules are moving from high to low concentration