The five main types of blood cells are basophils, neutrophils, eosinophils, monocytes, and lymphocytes.
The specialized lymph capillaries located in the small intestine? An antigen in any substance that the body regards as foreign. Lymphocytes are specialized red blood cells that attack specific microorganisms. B cell are most effective against viruses and bacteria that are circulating in the blood.
The effectiveness of biofeedback has been a subject of controversy because biofeedback __________.
A. has no reported side effects
B. cannot be effectively tested
C. has no reported negative effects
D. requires uncomfortable electrodes
Answer: B. cannot be effectively tested
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Once infected cells have sensed an invading pathogen, they secrete molecules called cytokines and chemokines. Cytokines such as interferons are molecules that signal neighbouring cells and induce an antiviral state in them. These cells are then primed to resist an infection with the invading virus.
Answer:
c
Explanation:
in the body the blood vessels always stay in tack and they can never get old.
