Question 1

Which of the following best describes the primary function of the lymphatic system?

Accepted Answer

Return interstitial fluid to the bloodstream and provide immune defense

Question 2

Lymphatic capillaries differ from blood capillaries in which of the following ways?

Accepted Answer

Lymphatic capillaries are closed at one end and have larger gaps between endothelial cells

Question 3

Which equation best represents the net movement of fluid from blood capillaries into interstitial spaces?

Accepted Answer

$$ Net\ Filtration = (HP_c - HP_i) - (OP_c - OP_i) $$

Question 4

A blockage in the thoracic duct would most likely result in which clinical condition?

Accepted Answer

Edema in the lower body and left upper limb

Question 5

Which of the following structures is responsible for filtering lymph and initiating immune responses?

Accepted Answer

Lymph nodes

Question 6

Which statement about lymphatic vessels is correct?

Accepted Answer

They have valves to prevent backflow of lymph

Question 7

Which of the following is a major difference between superficial and deep lymphatics?

Accepted Answer

Deep lymphatics accompany deep arteries and veins, while superficial lymphatics are found in the subcutaneous layer

Question 8

If a patient has a compromised lymphatic system, which of the following would most likely occur?

Accepted Answer

Decreased absorption of dietary fats

Question 9

Which of the following best explains why lymphatic capillaries are highly permeable?

Accepted Answer

They have overlapping endothelial cells that act as one-way valves

Question 10

Which vessel receives lymph from the majority of the body before returning it to the bloodstream?

Accepted Answer

Thoracic duct

Question 11

A patient presents with swelling in the right arm and right side of the head. Which lymphatic structure is most likely obstructed?

Accepted Answer

Right lymphatic duct

Question 12

Which of the following is NOT a function of the lymphatic system?

Accepted Answer

Producing red blood cells

Question 13

Which process allows interstitial fluid to enter lymphatic capillaries?

Accepted Answer

Pressure-driven opening of overlapping endothelial cells

Question 14

Which of the following best describes the flow of lymph through the body?

Accepted Answer

Lymph flows from capillaries to vessels, then through nodes, and finally into ducts that empty into veins

Question 15

Which equation would you use to calculate the rate of lymph formation if you know the net filtration pressure and the surface area of capillaries?

Accepted Answer

$$ Lymph\ Formation\ Rate = Net\ Filtration\ Pressure 	imes Surface\ Area $$

Question 16

Which of the following would most likely result from the removal of lymph nodes in the axillary region?

Accepted Answer

Edema in the upper limb

Question 17

Which of the following is a correct statement about lymphatic vessels and their relationship to veins?

Accepted Answer

Lymphatic vessels ultimately drain into the subclavian veins

Question 18

Which of the following best explains why lymphatic flow is unidirectional?

Accepted Answer

Presence of valves within lymphatic vessels

Question 19

Which of the following is a consequence of impaired lymphatic drainage?

Accepted Answer

Accumulation of interstitial fluid leading to tissue swelling

Question 20

Which of the following is the correct pathway for lymph from the lower limbs to the bloodstream?

Accepted Answer

Lymphatic capillaries → lymphatic vessels → lymph nodes → cisterna chyli → thoracic duct → left subclavian vein

The Lymphatic System: Structure and Function

Study Guide - Practice Questions