What structure forms the lower jaw?
A. mesonephros
B. mandibular processes
C. neural tube
D. secondary palate
E. somites
B
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Superoxide radicals have which of the following beneficial effects?
A. Promote proliferation of fibroblasts B. Killing bacteria C. Promote proliferation of lymphocytes D. All of the choices are correct.
What cell produces pepsinogen?
A) Acinar cellX B) Duodenal cell C) Chief cell D) Beta cell
The reconstruction of a diseased coronary artery by inserting a small balloon through the aorta and into a coronary artery is a procedure known as ____
a. atherosclerosis b. stenosis c. anastomosis d. angioplasty
Which structure encloses the cells of the human body?
a. a carbon shell b. an electron cluster c. microvilli d. a plasma membrane e. a protective protein sheath