Cell Transport Review Worksheet Answer Key

Cell Transport Review Worksheet Answer Key

Cells are the basic structural and functional units of living organisms, and they rely on various transport mechanisms to maintain homeostasis and ensure proper functioning. In this review, we will discuss the different types of cell transport, including passive and active transport, and provide answers to a worksheet on this topic.

Types of Cell Transport

Cell transport can be classified into two main categories: passive transport and active transport.

Passive Transport

Passive transport involves the movement of molecules across the cell membrane without the use of energy. There are three main types of passive transport:

• Diffusion: The movement of particles from an area of higher concentration to an area of lower concentration.
• Osmosis: The movement of water molecules from an area of higher concentration to an area of lower concentration through a selectively permeable membrane.
• Facilitated Diffusion: The movement of molecules across the cell membrane with the help of transport proteins.

Active Transport

Active transport involves the movement of molecules across the cell membrane using energy. There are two main types of active transport:

• Endocytosis: The process by which cells take in molecules or particles from outside the cell by engulfing them with their cell membrane.
• Exocytosis: The process by which cells release molecules or particles from inside the cell by fusing vesicles with the cell membrane.

Worksheet Answers

Section 1: Multiple Choice Questions

1. What is the main difference between passive and active transport?

   🤔 Note: Passive transport does not require energy, while active transport requires energy.

   Answer: A) Energy requirement

2. Which type of transport involves the movement of water molecules through a selectively permeable membrane? Answer: C) Osmosis

3. What is the function of transport proteins in facilitated diffusion? Answer: A) To provide energy for transport

4. Which type of active transport involves the release of molecules from inside the cell? Answer: B) Exocytosis

Section 2: Short Answer Questions

1. Describe the process of diffusion.

Answer: Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. It is a passive process that does not require energy.

1. Explain the difference between endocytosis and exocytosis.

Answer: Endocytosis is the process by which cells take in molecules or particles from outside the cell by engulfing them with their cell membrane. Exocytosis is the process by which cells release molecules or particles from inside the cell by fusing vesicles with the cell membrane.

Section 3: Essay Questions

1. Describe the different types of passive transport and provide examples of each.

Answer: Passive transport includes diffusion, osmosis, and facilitated diffusion. Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. Osmosis is the movement of water molecules through a selectively permeable membrane. Facilitated diffusion is the movement of molecules across the cell membrane with the help of transport proteins.

1. Explain the role of energy in active transport.

Answer: Energy is required for active transport to move molecules against their concentration gradient. This energy is often provided by ATP.

In Conclusion

Cell transport is a critical process that allows cells to maintain homeostasis and ensure proper functioning. Understanding the different types of cell transport, including passive and active transport, is essential for appreciating the complexity of cellular biology. By reviewing the answers to this worksheet, students can reinforce their knowledge of cell transport and develop a deeper understanding of this important topic.