Exam Questions and CORRECT Answers
What is the most common cause of lymphedema in the US? - CORRECT ANSWER -
Breast Cancer
Lymphedema vs Edema - CORRECT ANSWER - Lymph:
- Chronic, abnormal accumulation of protein and water in interstitial space, protein-rich swelling
- Unilateral (usually)
Edema:
- Symptom, usually bilateral and symmetrical
What is the function of the Lymphatic system and how does it work (vague answer)? -
CORRECT ANSWER - one-way system that Filters and breaks down substances in the
blood that blood cannot drain
begins in interstitial space and ends by being returned to venous system via R and L subclavian
veins
What does the Lymphatic System carry (called lymphatic load)? - CORRECT ANSWER -
Water, Proteins, Cells, Fat - anything too large to be taken in by the venous capillaries
2-4 liters of water taken in a day and returned to the venous system
Steps of Lymphatic System and what each part does? - CORRECT ANSWER - Initial
vessels: superficial dermis, picks up lymphatic load
Pre-collectors: connect collectors to initial capillaries
Collectors: Superficial fatty tissue to transport lymph to nodes
Nodes: proactive immune/thickening of lymph fluids
, Trunks: large lymph collectors
Venous Angles: terminus where lymph is returned to subclavian veins
Describe the Initial Lymph Vessels and Pre-collectors (like what are they made of) and their
overall function - CORRECT ANSWER - Initial: capillaries structure that are one cell
thick, endothelial cells
Pre-collectors: smooth m in deeper dermis
FXN: absorb fluid into lymphatic system
Describe what the Lymph Collectors do/are - CORRECT ANSWER - Collectors transport
lymph towards lymph nodes via valves and Lymphangion
when lymph enters, lymphangion stretch and then smooth m contracts to move it through valves
What are the 3 main functions of Lymph Nodes? - CORRECT ANSWER - Protection:
filters harmful fluids
Immune: produces antigen-stimulated lymphocytes
Thickening of Lymph fluid
Where are our Regional Lymph Nodes? How many lymph nodes do we have in our body? -
CORRECT ANSWER - Cervical
Axillary
Inguinal
Roughly 600-700 lymph nodes
- 200-300 in head/neck