Which of the following is not a mechanical barrier against microorganisms?
A. Tears
B. Diarrhea
C. Urine
D. Saliva
Answer: B
You might also like to view...
Cardiac muscle cells tend to be thicker and shorter than skeletal muscle cells.
Answer the following statement true (T) or false (F)
After surgical removal of the spleen (i.e., a splenectomy), some other organs take over most of its functions. Which of the following spleen functions in the adult can be performed by bone marrow?
A. immune surveillance B. erythropoiesis C. removal of aged and damaged red blood cells from the blood D. storage of platelets
The pyrimidine bases found in DNA are ________ and ________
A) cytosine; guanine B) adenine; guanine C) thymine; cytosine D) adenine; cytosine E) thymine; guanine
Lymphatic capillaries originate in the
A. tissue spaces between cells. B. yellow bone marrow. C. cisterna chyli. D. central nervous system. E. red bone marrow.