What formula correctly represents the behavior of CO2 in the blood?
A. CO2 + H2O « H2CO3 + CO
B. CO2 + H+ « HCO3+ « H2O + H2CO3
C. CO2 + HCO3- « H+ + H2O + H2CO3
D. CO2 + H2O « H2CO3 « HCO3- + H+
E. CO2 + H2CO3 + O2 « H2O + CO2 + H2CO3
D. CO2 + H2O « H2CO3 « HCO3- + H+
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In the flower diagram shown above, the item labeled "7" is the
a. filament. b. stigma. c. ovule. d. style. e. anther.
Exposure to which of the following chemicals is correlated with low birth weight and premature birth?
A) the plasticizer di(2-ethylhexyl)phthalate (DEHP) B) bisphenol A (BPA) C) the synthetic estrogen diethylstilbestrol (DES) D) polychlorinated biphenols (PCBs)
A couple has been trying unsuccessfully to conceive for several years. An examination reveals that scar tissue blocks the woman's uterine tubes
The woman has complained about large amounts of vaginal discharge, which coincide with her husband complaining of painful urination and a pus-filled discharge from his penis. Antibiotics clear up the infections. This couple has probably been infected with A) a protist. B) HPV. C) herpes. D) pubic lice. E) gonorrhea.
Members of the group A streptococci (GAS) cause all of the following EXCEPT
A) strep throat. B) scarlet fever. C) rheumatic fever. D) pharyngitis. E) epiglottitis.