As humans age, we tend to see a decrease in the function of various body systems. A decrease in which system will lead to problems in regulating body temperature?
A. digestive system
B. integumentary system
C. excretory system
D. respiratory system
E. cardiovascular system
Answer: B
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A. it happens in the absence of oxygen B. it requires oxygen C. it happens in mitochondria D. it requires carbon dioxide
Archaeal membranes contain which of the following lipids?
A. Glycolipids B. Phospholipids C. Sulfolipids D. All of the choices are correct.
Which pressure changes with the phases of respiration from a negative value during inspiration and a positive value during expiration?
A) transpulmonary pressure B) rebound pressure (elastic recoil) C) intrapleural pressure D) intra-alveolar pressure E) atmospheric pressure
How would a mutation allowing a heterocyte to synthesize more chlorophyll affect the process of nitrogen fixation?
A. There will be a decrease in the amount of ammonia converted to nitrogen gas. B. There will be no effect because photosynthesis and nitrogen fixation are not directly related. C. There will be an increase in the amount of nitrogen gas converted to ammonia. D. There will be an increase in the amount of ammonia converted to nitrogen gas. E. There will be a decrease in the amount of nitrogen gas converted to ammonia.