What is the plural form of pleura??
A) pleurae
B) pleurisy
C) pleuras
A
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For HLA typing, the cell of choice is the ________
Fill in the blank with correct word
Answer the following statements true (T) or false (F)
1. Gamma rays produced by radioactive sources such as nuclear weapons, nuclear energy plants, and radon gas, are the type of radiation that pose the greatest health concern. 2. Radioactive waste from nuclear power plants is disposed of in sanitary landfills. 3. Radiation from microwave ovens, high-voltage power lines, and computer monitors has been proven to have a negative impact on health. 4. Permanent hearing damage can occur through regular exposure to sounds louder than 100 decibels, even if the exposure lasts for only one minute each time. 5. Experts recommend using earbuds instead of earmuff-style headphones to listen to music.
Positive selection occurs when
a. cells become positive for either CD4 or CD8 by recognizing either the MHC class I or class II molecule b. cells that recognize self-antigens are allowed to live c. cells that recognize self-antigens undergo apoptosis d. none of the above
Part of the tooth that contains a rich supply of nerves and blood vessels:
a. Enamel b. Dentin c. Pulp d. Cementum e. Periodontal membrane