The Lymphatic and Immune System

The lymphatic system

• removes excess fluid from tissues.

• absorbs lipids from the digestive tract

• defends the body against microorganisms and other foreign substances

• All of these are correct.

Tags

NGSS.HS-LS1-3

Which of the following statements is correct?

• Lymphatic vessels do not have valves.

• Lymphatic vessels empty into lymph nodes

• Lymph from the right-lower limb passes into the right jugular or subclavian vein

• Lymph from the jugular and subclavian trunks empties into the cisterna chyli.

• All of these are correct.

The tonsils

• consist of large groups of lymphatic nodules

• protect against bacteria

• can become chronically infected.

• decrease in size in adults

• All of these are correct.

Lymph nodes

• filter lymph.

• are where lymphocytes divide and increase in number.

• contain a network of reticular fibers.

• contain lymphatic sinuses.

• All of these are correct.

Which of these statements about the spleen is not correct?

• The spleen has white pulp associated with the arteries

• The spleen has red pulp associated with the veins.

• The spleen destroys defective red blood cells.

• The spleen is surrounded by trabeculae located outside the capsule.

• The spleen is a limited reservoir for blood.

The thymus

• increases in size in adults.

• produces lymphocytes that move to other lymphatic tissue.

• is located in the abdominal cavity.

• All of these are correct.

Which of these is an example of innate immunity?

• Tears and saliva wash away microorganisms.

• Basophils release histamine and leukotrienes.

• Neutrophils phagocytize a microorganism.

• The complement cascade is activated.

• All of these are correct.

Neutrophils

• enlarge to become macrophages.

• account for most of the dead cells in pus.

• are usually the last cell type to enter infected tissues.

• are usually located in lymphatic and blood sinuses.

Macrophages

• are large, phagocytic cells that outlive neutrophils.

• develop from mast cells.

• often die after a single phagocytic event

• have the same function as eosinophils.

• All of these are correct.

Which of these cells is the most important in the release of histamine, which promotes inflammation?

• monocyte

• macrophage

• eosinophil

• mast cell