Of the following, which is an explanation of why the partial pressure of oxygen is lower in the lung than in the external air?
a. Humidified air in the lungs causes oxygen to precipitate out.
b. Lungs exert pressure on the air, reducing oxygen pressure.
c. Oxygen in the lungs diffuses into the blood through alveoli.
d. Oxygen cools within the lungs, exerting lower partial pressure.
c. Oxygen in the lungs diffuses into the blood through alveoli.
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Keystone species can have significant influences over several populations in a community through:
A. their ability to leave their environment relatively unchanged. B. their large body sizes. C. their effect on high amounts of biomass and energy transfer between populations. D. their roles as prey species for predator populations in the community. E. their avoidance of antagonistic interactions.
Trichomoniasis is the primary nonviral sexually transmitted disease worldwide. One complication of this infection is:
a. keratitis. b. endometritis. c. meningitis. d. appendicitis.
The most common types of health-care-associated infections are
A. gastrointestinal tract infections. B. urinary tract infections. C. respiratory tract infections. D. skin infections.
Geobacter: Uranium reduction
What will be an ideal response?