Hair follicles and blood vessels are found in which layer of the skin?
a. epidermis
b. dermis
c. subcutaneous tissue
d. stratum basale
e. stratum corneum
B
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Which of the following can cause toxic shock syndrome?
A) Clostridium difficile and Clostridium perfringens B) Mycoplasma pneumoniae and Mycobacterium tuberculosis C) Neisseria gonorrhoeae and Escherichia coli D) Staphylococcus aureus and Streptococcus pyogenes
A virion is composed of
A. lipid, protein, and either RNA or DNA. B. protein and either RNA or DNA, but no lipid. C. protein and both RNA and DNA, but no lipid. D. protein, either RNA or DNA, and possibly lipid.
HIV carries an enzyme called reverse transcriptase, which functions to ________
a. penetrate the cell membrane b. copy viral RNA into viral DNA c. copy viral DNA into viral RNA d. destroy the host cell genome
Ventilation refers to the process by which
A) gases are exchanged between the cells and the lungs. B) gases are exchanged between the air and the blood. C) air moves into and out of the lungs. D) gases are exchanged between the blood and the cells. E) ATPs are produced.