3.4 Cellular Transport

3.4 Cellular Transport

​Objective:

SWBAT describe the process of diffusion and explain how materials move into or out of the cell across the cell membrane.

Open Ended

Identify the transport required for Glucose to enter the cell. Justify your answer.

Multiple Choice

1. Living organisms can be classified as prokaryotes or eukaryotes. Which two structures are common to both prokaryotic and eukaryotic cells?

• 1. cell wall and nucleus

• 1. cell wall and chloroplast

• 1. plasma membrane and nucleus

• 1. plasma membrane and cytoplasm

Multiple Choice

1. Which of the following structures serves as the cell’s boundary from its environment? 

• Mitochondr

• Cell membrane

• chloroplast

• channel protein

Multiple Choice

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

• 1. Breaks downs lipids, carbohydrates, and proteins from foods

• 1. Stores water, salt, proteins, and carbohydrates

• 1. Keeps the cell wall in place

• 1. Regulates the movement of materials in and out of the cell

Multiple Choice

1. The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of? 

• Lipids

• Carbohydrates

• Proteins

• Bilipids

Multiple Choice

1. In a phospholipid bilayer,

• 1. the 

     1. phosphate groups are hydrophobic.

• 1. fatty acid tails are hydrophilic 

• 1. proteins are located only between the two layers. 

• 1. phosphate heads are oriented toward the exterior of the cell or toward the cytoplasm.

Multiple Choice

1. Whether a molecule can cross the plasma membrane depends upon 

• 1. the size of the molecule 

• 1. the chemical properties of the molecule

• 1. the charge of the molecule 

• All of the Above

Multiple Choice

1. A phospholipid molecule has a head and two tails. The tails are found 

• 1. at the surface of the membrane

• 1. in the interior of the membrane 

• 1. spanning the membrane 

• 1. where the environment is hydrophilic

Multiple Choice

1. Among the following choices, which one would most readily move through a selectively permeable membrane? 

• 1. small uncharged polar molecules 

• 1. protein hormone

• 1. large uncharged polar molecules 

• 1. glucose

Multiple Choice

1. Which of the following statements best describes the "fluid mosaic model" of the structure of the cell membrane below?

• 1. two layers of carbohydrates with proteins between the lipid layers

• 1. two layers of proteins with lipid layers between the protein layers

• 1. A single layer of protein on the outside and a single layer of lipids on the inside

• 1. a double layer of lipid molecules with protein molecules between the layers

Open Ended

What is the relationship between structure and function in the cell membrane?

Open Ended

Describe the difference between endocytosis and exocytosis.

Open Ended

1. A student claims that once diffusion is over and there are an equal number of molecules on both sides, the molecules stop diffusing. Provide evidence to support or refute the students claims using the diagrams above.

Open Ended

What is passive transport?

Open Ended

Why is the movement of molecules from a high concentration to a low concentration called passive transport?

Open Ended

What is active transport?

Open Ended

Why is the movement of molecules from a low concentration to a high concentration called active transport?