Chapter 30: Introduction to the Hematopoietic and Lymphatic Systems - Nurselytic

Correct Answer: C

Rationale: Erythrocytes (or RBCs) are flexible, anuclear (lacking a nucleus), biconcave disks covered by a thin membrane through which oxygen (Oâ??) and carbon dioxide (COâ??) pass freely. The flexibility of erythrocytes allows them to change shape as they travel through capillaries. Their major function is to transport Oâ?? to and remove COâ?? from the tissues. The RBCs are not involved in immunological functions, so choices A and B are not correct. Oxygenation of the brain is important but that is not a major function of RBCs.

Correct Answer: A

Rationale: Globulins function primarily as immunologic agents; they prevent or modify some types of infectious diseases. Globulins do not destroy invading organisms, participate in clot formation, or transport oxygen to the tissues.

Correct Answer: C

Rationale: The thymus gland is lymphatic tissue in the upper chest that contains undifferentiated stem cells released from bone marrow. Once the undifferentiated cells migrate to the thymus gland, they develop into T lymphocytes because they are thymus derived. The other options are distractors for this question.

Correct Answer: B

Rationale: As lymph passes through the node, macrophages attack and engulf foreign substances such as bacteria and viruses, abnormal body cells, and other debris. The other options are incorrect.

Correct Answer: C

Rationale: Under normal conditions, albumin cannot pass through a capillary wall. Consequently, albumin helps maintain the osmotic pressure that retains fluid in the vascular compartment. Albumin does not push oxygen into the tissues of the body or absorb carbon dioxide for transport to the lungs. Albumin also does not retain leukocytes in the vascular compartment.