Chapter 16: Lymphatic System

What term refers to any molecule that elicits an immune response?

Antigen

What type of immunity will result from receiving a vaccination?

Artificially acquired active immunity

What term is used for disorders resulting from the immune system attacking "self" cells?

Autoimmune diseases

In order to be fully activated, most __________ cells require interaction with __________ cells.

B; T

When T or B cells are activated, they proliferate, forming a group of genetically identical cells descending from the original activated cell. What is the name of this group of identical cells?

Clone

Activation of what group of proteins in the plasma leads to inflammation, attraction of phagocytes, and enhancement of phagocytosis?

Complement

Absence or blockage of lymph vessels in a body region leads directly to what condition?

Edema

The thymus enlarges after puberty.

False

What class of immunoglobulin is involved in immediate-reaction allergic reactions?

IgE

What is the name of the fluid contained within vessels of the lymphatic system?

Lymph

Lymph eventually is returned to the circulation at what blood vessels?

Right and left subclavian veins

Allograft

Same species

Memory T and B cells function in what type of response?

Secondary immune responses

What is not true of the spleen?

The spaces in the lobes of the spleen are filled with lymph.

What is the first component(s) of the immune system to decline with age?

Thymus

Muscle contraction moves lymph through lymphatic vessels.

True

Older red blood cells may be destroyed in the spleen.

True

The thymus is in the mediastinum behind the sternum.

True

xenograft

different species

The region of a lymph node through which blood vessels and nerves pass is called the

hilum

isograft

identical twin

Lymph differs from plasma in that

plasma has more protein than lymph

autograft

self

The two collecting ducts that drain the lymphatic trunks are the

thoracic duct and right lymphatic duct.

Lymphatic pathways begin at the lymphatic capillaries which empty into lymphatic vessels. From there, fluid flows through lymphatic __________ into lymphatic __________, eventually emptying into veins in the thorax.

trunks; ducts

The structure of a lymphatic vessel is most similar to that of a(n)

vein