Lymphatic System Quiz

What is the primary function of the one cell-thick layer of endothelial cells in lymphatic capillaries?

• To prevent the entry of interstitial fluid into the system

• To allow interstitial fluid to flow into the system

• To transport blood throughout the body

• To close the spaces between the cells permanently

What happens to the endothelial flaps of lymphatic capillaries when interstitial pressure is low?

• They open up to allow fluid to enter

• They close to prevent "backflow"

• They become permeable to large molecules

• They detach from the capillaries

What occurs as interstitial pressure increases in relation to lymphatic capillaries?

• The endothelial flaps close tightly

• The capillaries collapse and prevent fluid entry

• The spaces between the cells open up, allowing fluid to enter

• The lymphatic fluid is expelled back into the interstitial space

What is the result of fluid entering lymphatic capillaries?

• It causes the capillaries to close

• It prevents "backflow" of fluid

• It increases interstitial pressure further

• It initiates the entry of fluid into lymphatic vessels

How do lymphatic capillaries facilitate the movement of large molecules like proteins?

• By breaking down the molecules into smaller units

• Through active transport mechanisms

• By having a larger diameter than blood capillaries

• By the gaps between endothelial cells

What role do lymph nodes play in the lymphatic system?

• They produce lymphatic fluid

• They filter lymphatic fluid, removing debris and pathogens

• They serve as a storage area for lymphatic fluid

• They transport lymphatic fluid back to the bloodstream

What is the significance of the 'valves' found within lymphatic vessels?

• To regulate the flow of blood

• To prevent the backflow of lymphatic fluid

• To allow exchange of nutrients and waste with blood vessels

• To facilitate the transport of lymphatic fluid to the heart

Which component of the lymphatic system is primarily responsible for the production of lymphocytes?

• Lymphatic vessels

• Lymph nodes

• Thymus

• Spleen

What is the primary role of the spleen in the lymphatic system?

• To produce hormones that regulate lymphatic function

• To serve as the main filtration point for blood

• To store excess lymphatic fluid

• To transport lymph throughout the body

How does the structure of lymph nodes facilitate their function in the lymphatic system?

• By allowing for the rapid transport of lymph to the heart

• By providing a site for the exchange of gases and nutrients

• By enabling the filtration of lymph to remove pathogens and debris

• By producing lymphatic fluid to maintain fluid balance