What is the function of dendritic cells within lymph nodes?
A. They initiate replication of macrophages.
B. They conduct signals between activated T-lymphocytes to accelerate the immune response.
C. They collect antigens and present them to T-lymphocytes.
D. They absorb fluid when infected, causing the lymph nodes to swell and become tender to the touch.
E. They secrete lymphatic hormones to stimulate adjacent lymph nodes.
Answer: C
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Which structures in capillary beds open to allow the capillaries to perfuse with blood?
A. Thoroughfare channels B. Precapillary sphincters C. Fenestrations D. Postcapillary sphincters E. Metarterioles
A clinical disease that results in an inability to absorb fats will not result in malnutrition.
Answer the following statement true (T) or false (F)
The lungs eliminate ________ created as a result of cellular metabolism.
A. carbon dioxide B. nitrogen C. energy D. foreign particles
The most numerous white blood cells are __________.
Fill in the blank(s) with the appropriate word(s).