$$\text{Tissue fluid} = \text{Blood plasma} - \text{Proteins}$$

Question 1

Which of the following best describes the primary function of lymphatic vessels as shown in the first diagram?

Accepted Answer

Carry lymph containing lymphocytes and waste products away from tissues

Question 2

What is the main role of the valves in lymph nodes, as illustrated in the second diagram?

Accepted Answer

Prevent lymph from flowing in the wrong direction

Question 3

Which organ, shown in the third diagram, is most active during adolescence and shrinks in adulthood?

Accepted Answer

Thymus

Question 4

If a patient has swollen lymph nodes in their neck, which condition is most likely responsible?

Accepted Answer

Lymphadenopathy caused by infection

Question 5

Which of the following is NOT a function of the spleen?

Accepted Answer

Producing insulin for glucose regulation

Question 6

A cancer cell breaks away from a tumor and enters the lymphatic system. What is most likely to happen next?

Accepted Answer

The cancer cell becomes stuck in a nearby lymph node

Question 7

Which equation best represents the relationship between tissue fluid, lymph, and blood plasma?

Accepted Answer

$$	ext{Tissue fluid} = 	ext{Blood plasma} - 	ext{Proteins}$$

Question 8

Which cells are densely packed in lymph nodes and play a key role in immune defense?

Accepted Answer

B cells, T cells, macrophages, and plasma cells

Question 9

Which of the following best explains why the lymphatic system is important for fighting cancer?

Accepted Answer

It filters out cancer cells in lymph nodes, preventing their spread

Question 10

A patient has an infection in their throat. Which lymphatic organs are most likely to respond first?

Accepted Answer

Tonsils and adenoids

Question 11

Which of the following statements about lymph is correct?

Accepted Answer

Lymph is a colorless fluid rich in lymphocytes

Question 12

Which pathway correctly describes the flow of lymph from tissues back to the blood circulation?

Accepted Answer

Tissue fluid → lymphatic vessels → lymph nodes → thoracic duct → blood circulation

Question 13

Which of the following is a real-life consequence of lymphatic system malfunction?

Accepted Answer

Edema due to accumulation of tissue fluid

Question 14

Which equation best represents the filtration function of the spleen?

Accepted Answer

$$	ext{Filtered blood} = 	ext{Total blood} - 	ext{Worn out red blood cells}$$

Question 15

Which of the following best describes the role of the tonsils and adenoids?

Accepted Answer

Protect the entrance to the digestive system and lungs from bacteria and viruses

Question 16

Which of the following scenarios best illustrates the application of lymphatic system knowledge in medicine?

Accepted Answer

A doctor checks for swollen lymph nodes to diagnose infection or cancer

Question 17

Which of the following is a plausible reason for lymphadenopathy?

Accepted Answer

Infection or cancer causing swelling of lymph nodes

Question 18

Which equation best represents the immune response in lymph nodes?

Accepted Answer

$$	ext{Immune response} = 	ext{B cells} + 	ext{T cells} + 	ext{Macrophages} + 	ext{Plasma cells}$$

Question 19

Which of the following best explains why the thymus is important in early life?

Accepted Answer

It produces white blood cells essential for developing immunity

Question 20

Which of the following is a correct statement about the lymphatic system's similarity to the blood circulation system?

Accepted Answer

Both systems branch throughout the body, but lymphatic vessels are finer and carry lymph instead of blood

The Lymphatic System: Structure, Function, and Key Organs

Study Guide - Practice Questions