APHY 102: Chapter 16 Test Questions
All Solved Correct.
Lymphatic Vessels - Answer -Similar to veins but thinner.
-They are composed of three layers: an endothelial lining (inner), smooth muscle (middle),
connective tissue (outer).
-Larger vessels lead to lymph nodes and then to larger lymphatic trunks.
Lymphatic Trunks and Collecting Ducts - Answer -The trunks drain lymph from the lymphatic
vessels.
-They are named for the regions they serve (lumbar, intestinal, intercostal, bronchomediastinal,
subclavian, jugular).
Tissue and Fluid Lymph - Answer -Lymph is essentially tissue fluid that has entered a
lymphatic capillary.
-Lymph formation depends on tissue fluid formation.
Tissue Fluid Formation - Answer -Capillary blood pressure filters water and small molecules
from the plasma.
-The resulting fluid has: much the same consistency as plasma, contains water and dissolved
substances (with the exception of some plasma proteins).
Lymph Formation - Answer -Filtration from the plasma normally exceeds reabsorption,
leading to the net formation of tissue fluid.
-This increases the tissue fluid hydrostatic pressure within interstitial spaces forcing fluid into
lymphatic capillaries forming lymph.
-This process prevents accumulation of excess tissue fluid or edema.
Lymph Function - Answer -Absorption of dietary fats.
-Delivering fats to the bloodstream.
-Collecting of excess interstitial fluids.
-Delivering excess fluids to the bloodstream.
-Delivering foreign particles to the lymph nodes.
Lymph Movement - Answer -Hydrostatic pressure of tissue fluid drives the lymph into the
lymphatic capillaries.
, -Muscle activity largely influences the movement of lymph through the lymphatic vessels via:
action of skeletal muscles, respiratory movements, smooth muscle in the larger lymphatic
vessels.
-Valves in lymphatic vessels prevent backflow.
Obstruction of Lymph Movement - Answer Conditions that interfere with lymph movement
cause tissue fluid to accumulate in interstitial spaces, resulting in edema.
Lymph Glands/Nodes - Answer -Located along the lymphatic pathways.
-They contain lymphocytes and macrophages to fight invading pathogens.
Locations of Lymph Nodes - Answer They are found in groups or chains along the paths of the
larger lymphatic vessels throughout the body, including the: cervical, axillary, supratrochlear,
inguinal, pelvic, abdominal, and thoracic cavities.
Functions of Lymph Nodes - Answer -Filter potentially harmful particles from the lymph.
-Act with immune surveillance provided by macrophages and lymphocytes.
-Along with the red bone marrow, the lymph nodes are centers for lymphocyte production.
Thymus - Answer -Larger in infancy and during puberty but small in an adult.
-Replaced by fat and connective tissue in the elderly.
-House lymphocytes.
-Secretes protein hormones called thymosins, which stimulate maturation of T lymphocytes.
Spleen - Answer -The largest lymphatic organ.
-Located in the upper left abdominal quadrant.
-Has sinuses filled with blood.
-Contains two tissue types: white pulp (lymphocytes), and red pulp (red blood cells,
lymphocytes, and macrophages).
-Filters blood.
Pathogens are... - Answer -Disease causing agents.
-Bacteria, viruses, complex microorganisms, and spores of multicellular organisms.
The body can prevent entry of pathogens or destroy them with defense mechanisms such as... -
Answer Innate defenses and adaptive defenses.
All Solved Correct.
Lymphatic Vessels - Answer -Similar to veins but thinner.
-They are composed of three layers: an endothelial lining (inner), smooth muscle (middle),
connective tissue (outer).
-Larger vessels lead to lymph nodes and then to larger lymphatic trunks.
Lymphatic Trunks and Collecting Ducts - Answer -The trunks drain lymph from the lymphatic
vessels.
-They are named for the regions they serve (lumbar, intestinal, intercostal, bronchomediastinal,
subclavian, jugular).
Tissue and Fluid Lymph - Answer -Lymph is essentially tissue fluid that has entered a
lymphatic capillary.
-Lymph formation depends on tissue fluid formation.
Tissue Fluid Formation - Answer -Capillary blood pressure filters water and small molecules
from the plasma.
-The resulting fluid has: much the same consistency as plasma, contains water and dissolved
substances (with the exception of some plasma proteins).
Lymph Formation - Answer -Filtration from the plasma normally exceeds reabsorption,
leading to the net formation of tissue fluid.
-This increases the tissue fluid hydrostatic pressure within interstitial spaces forcing fluid into
lymphatic capillaries forming lymph.
-This process prevents accumulation of excess tissue fluid or edema.
Lymph Function - Answer -Absorption of dietary fats.
-Delivering fats to the bloodstream.
-Collecting of excess interstitial fluids.
-Delivering excess fluids to the bloodstream.
-Delivering foreign particles to the lymph nodes.
Lymph Movement - Answer -Hydrostatic pressure of tissue fluid drives the lymph into the
lymphatic capillaries.
, -Muscle activity largely influences the movement of lymph through the lymphatic vessels via:
action of skeletal muscles, respiratory movements, smooth muscle in the larger lymphatic
vessels.
-Valves in lymphatic vessels prevent backflow.
Obstruction of Lymph Movement - Answer Conditions that interfere with lymph movement
cause tissue fluid to accumulate in interstitial spaces, resulting in edema.
Lymph Glands/Nodes - Answer -Located along the lymphatic pathways.
-They contain lymphocytes and macrophages to fight invading pathogens.
Locations of Lymph Nodes - Answer They are found in groups or chains along the paths of the
larger lymphatic vessels throughout the body, including the: cervical, axillary, supratrochlear,
inguinal, pelvic, abdominal, and thoracic cavities.
Functions of Lymph Nodes - Answer -Filter potentially harmful particles from the lymph.
-Act with immune surveillance provided by macrophages and lymphocytes.
-Along with the red bone marrow, the lymph nodes are centers for lymphocyte production.
Thymus - Answer -Larger in infancy and during puberty but small in an adult.
-Replaced by fat and connective tissue in the elderly.
-House lymphocytes.
-Secretes protein hormones called thymosins, which stimulate maturation of T lymphocytes.
Spleen - Answer -The largest lymphatic organ.
-Located in the upper left abdominal quadrant.
-Has sinuses filled with blood.
-Contains two tissue types: white pulp (lymphocytes), and red pulp (red blood cells,
lymphocytes, and macrophages).
-Filters blood.
Pathogens are... - Answer -Disease causing agents.
-Bacteria, viruses, complex microorganisms, and spores of multicellular organisms.
The body can prevent entry of pathogens or destroy them with defense mechanisms such as... -
Answer Innate defenses and adaptive defenses.
