Cytokines are low-molecular-weight polypeptides exerting a wide variety of biologic effects at both local and systemic levels. Which of the following statement(s) is/are true concerning the production and actions of cytokines?
A. Cytokines are produced solely by macrophages
B. Cytokines act only on other cells within the same local environment
C. Cytokines may have both protective and deleterious effects on the host
D. Each specific cytokine is produced by a single cell type
Answer:C
Cytokines are low-molecular-weight polypeptides exerting a wide variety of biologic effects at both local and systemic levels. Which of the following statement(s) is/are true concerning the production and actions of cytokines?
A. Cytokines are produced solely by macrophages B. Cytokines act only on other cells within the same local environment C. Cytokines may have both protective and deleterious effects on the host D. Each specific cytokine is produced by a single cell type