The work of breathing normally requires about 3% of total energy expenditure, this increases under all of the following situations except
a. when elastic recoil is decreased.
b. when resistance goes up.
c. when the partial pressure of oxygen decreases in the air.
d. when ventilation must be increased.
e. it increases with all of the above
E
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The pelvic girdle does not include the ________.
A) sacrum B) ilium C) ischium D) pubis
All of the following chemical messengers may be listed in multiple functional classes except
A. Eicosanoids B. Epinephrine C. Prostaglandins D. Acetylcholine
Oxidative deamination takes place in the ________.
A) liver B) muscles C) kidneys D) blood
Which of the following is true of adaptive immunity?
A. It is present at birth. B. Previous encounters with the foreign substance does not change the response. C. The second response is faster and stronger than the first response. D. Responses are general, not specific.