A&P II Exam 2 Study Guide: Lymphatic, Immune, and Respiratory Systems

Q1. What are the functions of the lymphatic system?

Background

Topic: Lymphatic System Overview

This question tests your understanding of the main roles played by the lymphatic system in the human body, including fluid balance, immune defense, and absorption of dietary fats.

Key Terms:

• Lymphatic system

• Immunity

• Fluid homeostasis

• Absorption of fats

Step-by-Step Guidance

1. Recall that the lymphatic system is a network of vessels, nodes, and organs that helps maintain fluid balance in the body.

2. Think about how the lymphatic system is involved in defending the body against pathogens and foreign substances.

3. Consider the role of the lymphatic system in absorbing fats and fat-soluble vitamins from the digestive tract.

4. Try to list at least three major functions based on your textbook or lecture notes.

Try solving on your own before revealing the answer!

Q2. How much fluid is returned per day?

Background

Topic: Lymphatic System Fluid Recovery

This question is about the amount of interstitial fluid that the lymphatic system returns to the bloodstream each day.

Key Terms:

• Interstitial fluid

• Lymph

• Fluid balance

Step-by-Step Guidance

1. Recall that capillaries leak fluid into tissues, which becomes interstitial fluid.

2. The lymphatic system collects this fluid and returns it to the circulatory system.

3. Check your textbook or lecture notes for the typical daily volume of fluid returned.

Try solving on your own before revealing the answer!

Q3. Lymph is similar to which other fluid? List the components of lymph. Why is it white?

Background

Topic: Lymph Composition and Appearance

This question tests your knowledge of what lymph is, what it contains, and why it appears white.

Key Terms:

• Lymph

• Plasma

• Chyle

• White appearance

Step-by-Step Guidance

1. Think about the origin of lymph and which fluid it most closely resembles in composition.

2. List the main components found in lymph, such as water, proteins, and cells.

3. Consider why lymph may appear white, especially after a meal.

4. Review the role of dietary fats in the color of lymph.

Try solving on your own before revealing the answer!

Q4. What are lymphatic capillaries? What is another term for them?

Background

Topic: Lymphatic Capillaries Structure and Terminology

This question is about the smallest vessels in the lymphatic system and their alternate names.

Key Terms:

• Lymphatic capillaries

• Lacteals

Step-by-Step Guidance

1. Recall the structure and function of lymphatic capillaries.

2. Think about the term used for lymphatic capillaries in the small intestine.

3. Review the differences between lymphatic and blood capillaries.

Try solving on your own before revealing the answer!

Q5. How are lymphatic capillaries different from systemic capillaries?

Background

Topic: Capillary Structure Comparison

This question tests your understanding of the structural and functional differences between lymphatic and blood capillaries.

Key Terms:

• Permeability

• Endothelial cells

• One-way valves

Step-by-Step Guidance

1. Recall the basic structure of blood capillaries.

2. Compare this to the structure of lymphatic capillaries, focusing on permeability and valves.

3. Think about how these differences affect what enters each type of capillary.

Try solving on your own before revealing the answer!

Q6. How does their structure affect their permeability? What determines if substances enter the lymphatic capillary? What type of material/debris/cells enter?

Background

Topic: Lymphatic Capillary Permeability

This question is about how the unique structure of lymphatic capillaries allows them to take up certain substances.

Key Terms:

• Permeability

• Anchoring filaments

• Interstitial fluid

• Cellular debris

Step-by-Step Guidance

1. Review the structure of lymphatic capillaries, especially the overlapping endothelial cells.

2. Consider how increased interstitial fluid pressure opens these cells, allowing entry.

3. List the types of substances that can enter, such as proteins, pathogens, and debris.

4. Think about why this permeability is important for immune function.

Try solving on your own before revealing the answer!

Q7. What are lymphatics? How are they similar to veins?

Background

Topic: Lymphatic Vessels and Circulation

This question is about the structure and function of lymphatic vessels and their similarities to veins.

Key Terms:

• Lymphatic vessels

• Valves

• Low-pressure system

Step-by-Step Guidance

1. Recall the structure of veins and how they move blood.

2. Compare this to lymphatic vessels, focusing on valves and pressure.

3. Think about how lymph is moved through the system.

Try solving on your own before revealing the answer!

Q8. How is lymph moved throughout the lymphatic system? Which way does it move?

Background

Topic: Lymph Flow and Direction

This question tests your understanding of the mechanisms that propel lymph and its direction of flow.

Key Terms:

• Muscle contraction

• Valves

• One-way flow

Step-by-Step Guidance

1. Recall the role of skeletal muscle contraction in moving lymph.

2. Think about the importance of valves in preventing backflow.

3. Review the direction of lymph flow—from tissues toward the heart.

Try solving on your own before revealing the answer!