Bacteria and debris are actively removed from the lymph by ________ in the sinuses of lymph nodes.
A. germinal cells
B. trabecular cells
C. plasma cells
D. macrophages
E. lymphocytes
Answer: D
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A muscle whose name ends in the suffix -glossus would be found within or attached to the
A) chin. B) cheek. C) jaw. D) tongue. E) lips.
Which prenatal structure forms the ascending aorta and pulmonary trunk?
A. Truncus arteriosus B. Sinus venosus C. Primitive atrium D. Primitive ventricle E. Conus cordis
Binding of ____ to myosin permits cross-bridge ____ between actin and myosin
a. ATP, binding. b. ATP, detachment. c. calcium, binding. d. calcium, detachment. e. none of these answers.
Which of the following lung infections or disorders could be caused by smoking?
A. Pneumonia and tuberculosis B. Black lung and cystic fibrosis C. Bronchitis and flu D. Cancer and emphysema