Loud sounds cause temporary hearing loss due to damage to the:
a. eardrum
b. auditory nerve
c. cilia of the hair cells
d. middle ear bones
e. outer ear
c
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Starting with shredded spinach leaves, you follow a procedure that separates cellular organelles into different fractions. To identify the fraction that contains the mitochondria, you should test for the presence of
A) aquaporin. B) insulin receptors. C) phospholipids present only in the mitochondrial outer membrane. D) mitochondrial wall polysaccharides. E) electron transport proteins.
In general, developed countries have lower population growth rates than less developed countries
Indicate whether the statement is true or false
When practicing aseptic culturing techniques, it is important to keep all of the following in mind except
A) surrounding surfaces are decontaminated before and after handling cultures. B) gloves and other protecting clothing may be required depending on the specimen being used. C) the media used to grow the specimen is sterile. D) all of the instruments and lab ware that directly touch the specimen is sterile. E) as long as nothing unintended touches the media, there will be no contamination.
What is the result when a dendritic cell phagocytizes a microbe and processes it?
A. activation of the dendritic cell to become a plasma cell B. display of epitope-MHC I complexes on the surface of the cell C. suppression of the immune response to the microbe D. display of microbial fragments with CD8 glycoproteins E. display of microbial epitope-MHC II complexes on the cell surface