Which of the following statements regarding phagocytes and phagocytosis is true?
A. Macrophages, monocytes, and mast cells are phagocytes.
B. Contact of phagocytes with microbes stimulates the phagocytes to release chemicals that mediate the inflammatory response.
C. Phagocytosis is stimulated by the presence of proteins called rhodopsins.
D. Phagocytosis is the process by which leukocytes exit the bloodstream.
E. Phagocytosis is a process that only occurs within the bloodstream.
B
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Myofibrils contain
a) contractile proteins. b) regulatory proteins. c) structural proteins. d) all of these answers are correct. e) none of these answers are correct.
Which of the following structures is the richest in lipid content?
A. Gray matter B. White matter C. Arachnoid mater D. Dura mater E. Pia mater
Which of the following formed elements found in the blood are derived from reticulocytes?
a) Platelets b) Erythrocytes c) T lymphocytes d) Monocytes e) Basophils
The total volume of blood in the body of a 76-kg man is approximately ________ liters
A) 10 B) 6 to 8 C) 5.3 D) 4.4 E) 3.8