Which of the following is a way in which bacteria help the environment?
A. They are used to clean water in sewage treatment facilities.
B. They remove pollutants from the environment.
C. They break down dead organisms in the soil and recycle nutrients.
D. All of the above are ways in which bacteria help the environment.
Answer: D
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Water is useful for cooling organisms mainly due to its
a. hydration layers. b. specific heat. c. low calories. d. surface tension. e. heat of vaporization.
Human vocal cords are located in the
a. glottis. b. pharynx. c. trachea. d. larynx. e. bronchus
Your patient has a rash, a fever, and a very high white blood cell count. Blood specimens are taken, put into culture bottles, and sent down to the microbiology lab for incubation and analysis. Select the statement that best reflects why microbial analysis of blood is an important step in patient diagnosis.
A. Microbial growth in blood samples may indicate sepsis. B. A lack of microbes in the blood means that the patient's health is critical. C. Blood specimens are often obtained through poor aseptic technique by the healthcare worker: this is documentation of their failure to employ proper universal precautions. D. A few bacterial cells in a blood sample are no big deal and should be ignored.
What prompts monthly preparation of uterus for pregnancy?
A. Progesterone B. Estradiol C. Prolactin D. Oxytocin E. Testosterone