Antibodies may bind to superficial sites on bacteria or other toxins, making the toxin incapable of attaching itself to a cell. This mechanism is known as
A) opsonization.
B) agglutination.
C) phagocytosis.
D) neutralization.
E) costimulation.
Answer: D
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Which of the following is not a source of ionizing radiation?
A. Smoke detectors B. Cholesterol and triglycerides C. Atomic and nuclear weapons D. Cosmic rays from outer space
Which of the following refers to the transfer of sperm and harvested oocytes together into the woman's uterine tubes in the hopes that fertilization will take place there?
A) in vitro fertilization (IVF) B) zygote intrafallopian transfer (ZIFT) C) rhythm method D) gamete intrafallopian transfer (GIFT)
What is the most important force driving reabsorption at the venous end of a capillary?
A. Blood hydrostatic pressure B. Tissue fluid colloid osmotic pressure C. Oncotic pressure D. Blood colloid osmotic pressure E. Interstitial hydrostatic pressure
The layer of epithelium that covers the skin is called the
A. hypodermis. B. epidermis. C. dermis. D. papillary layer. E. mesodermis.