12.2   Multiple Choice

1) Lymph is largely composed of water that has escaped from:

A) cytosol

B) cerebrospinal fluid

C) saliva

D) tears

E) blood

2) Lymph in the right leg rejoins blood flow in the:

A) inferior vena cava

B) femoral veins

C) subclavian veins

D) axillary veins

E) common iliac veins

3) Lymph from the left arm returns to the heart through the:

A) inferior vena cava

B) thoracic duct

C) right lymphatic duct

D) left subclavian artery

E) aorta

4) Which one of the following is NOT a mechanism that aids lymph return:

A) milking action of skeletal muscles

B) pressure changes within the thorax

C) the pumping action of the heart

D) smooth muscle contractions within the lymphatic vessels

E) presence of valves within the larger lymph vessels

5) What structure carries lymph into a lymph node:

A) trabeculae

B) afferent lymphatic vessel

C) follicles

D) efferent lymphatic vessel

E) germinal center

6) Which lymphatic organ’s major job is to destroy worn-out red blood cells and return some of the products to the liver:

A) tonsils

B) spleen

C) thymus gland

D) tonsils

E) Peyer’s patches

7) Which lymphoid tissues trap and remove bacteria entering the throat:

A) axillary lymph nodes

B) cervical lymph nodes

C) tonsils

D) Peyer’s patches

E) thymus gland

8) The thymus gland is most active during:

A) infancy

B) adolescence

C) middle age

D) old age

E) the entire lifetime

9) The lymph organ that programs T cells and functions at peak levels only during youth is the:

A) thymus

B) spleen

C) appendix

D) tonsils

E) Peyer’s patches

10) The lymph tissues found within the walls of the small intestine are called:

A) tonsils

B) appendix

C) Peyer’s patches

D) thymus tissues

E) intestinal nodes