The cardiovascular system protects the body from disease and invasion from pathogens
Indicate whether the statement is true or false
FALSE
Explanation: The immune system protects the body from disease and invasion from pathogens.
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Reticular networks in the lymph nodes
A. are made of fibroblasts. B. guide T-cell movements. C. guide B-cell movements. D. regulate lymphocyte direction. E. All of the above
Co-receptor molecules are required by TC and TH cells so that the TCR can stably bind to the MHC peptide presenting the antigen. Which co-receptor molecules are common to both TC and TH cells and their respective antigen presenting cells?
A. CD2/LFA-3 B. CD28/B7 C. CD45R/CD22 D. LFA-1/ICAM-1 E. All but B
Risk factors for suicide include the presence of mental and substance abuse disorders, a family history of suicide, and a firearm in the home.
Answer the following statement true (T) or false (F)
A ________ is the mark left by the healing process of a wound, sore, or injury
A) scabies B) macule C) scar D) pustule